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1542022661 is a prime number
BaseRepresentation
bin101101111101001…
…0110011000000101
310222110120212102102
41123322112120011
511124224211121
6413002521445
753132655614
oct13372263005
93873525372
101542022661
117214824a3
12370506285
131b761665a
14108b2187b
159059a90b
hex5be96605

1542022661 has 2 divisors, whose sum is σ = 1542022662. Its totient is φ = 1542022660.

The previous prime is 1542022637. The next prime is 1542022709. The reversal of 1542022661 is 1662202451.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1245666436 + 296356225 = 35294^2 + 17215^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2k-1542022661 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1542022561) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 771011330 + 771011331.

It is an arithmetic number, because the mean of its divisors is an integer number (771011331).

Almost surely, 21542022661 is an apocalyptic number.

It is an amenable number.

1542022661 is a deficient number, since it is larger than the sum of its proper divisors (1).

1542022661 is an equidigital number, since it uses as much as digits as its factorization.

1542022661 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 5760, while the sum is 29.

The square root of 1542022661 is about 39268.5963716556. The cubic root of 1542022661 is about 1155.3057069505.

The spelling of 1542022661 in words is "one billion, five hundred forty-two million, twenty-two thousand, six hundred sixty-one".