1551064663 has 8 divisors (see below), whose sum is σ = 1583874000. Its totient is φ = 1518386688.

The previous prime is 1551064637. The next prime is 1551064687. The reversal of 1551064663 is 3664601551.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 1551064663 - 2⁵ = 1551064631 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1551064693) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 8793 + ... + 56386.

It is an arithmetic number, because the mean of its divisors is an integer number (197984250).

Almost surely, 2^1551064663 is an apocalyptic number.

1551064663 is a deficient number, since it is larger than the sum of its proper divisors (32809337).

1551064663 is an equidigital number, since it uses as much as digits as its factorization.

1551064663 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 65681.

The product of its (nonzero) digits is 64800, while the sum is 37.

The square root of 1551064663 is about 39383.5582826133. The cubic root of 1551064663 is about 1157.5594405238.

The spelling of 1551064663 in words is "one billion, five hundred fifty-one million, sixty-four thousand, six hundred sixty-three".