61550653 has 2 divisors, whose sum is σ = 61550654. Its totient is φ = 61550652.

The previous prime is 61550651. The next prime is 61550663. The reversal of 61550653 is 35605516.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 41641209 + 19909444 = 6453^2 + 4462^2 .

It is a cyclic number.

It is not a de Polignac number, because 61550653 - 2¹ = 61550651 is a prime.

Together with 61550651, it forms a pair of twin primes.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (61550651) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 30775326 + 30775327.

It is an arithmetic number, because the mean of its divisors is an integer number (30775327).

Almost surely, 2^61550653 is an apocalyptic number.

It is an amenable number.

61550653 is a deficient number, since it is larger than the sum of its proper divisors (1).

61550653 is an equidigital number, since it uses as much as digits as its factorization.

61550653 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 13500, while the sum is 31.

The square root of 61550653 is about 7845.4224232988. The cubic root of 61550653 is about 394.8306767729.

The spelling of 61550653 in words is "sixty-one million, five hundred fifty thousand, six hundred fifty-three".