61296911657 has 2 divisors, whose sum is σ = 61296911658. Its totient is φ = 61296911656.

The previous prime is 61296911647. The next prime is 61296911743. The reversal of 61296911657 is 75611969216.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 47621714176 + 13675197481 = 218224^2 + 116941^2 .

It is a cyclic number.

It is not a de Polignac number, because 61296911657 - 2¹⁴ = 61296895273 is a prime.

It is a super-2 number, since 2×61296911657² (a number of 22 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 61296911599 and 61296911608.

It is not a weakly prime, because it can be changed into another prime (61296911647) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 30648455828 + 30648455829.

It is an arithmetic number, because the mean of its divisors is an integer number (30648455829).

Almost surely, 2^61296911657 is an apocalyptic number.

It is an amenable number.

61296911657 is a deficient number, since it is larger than the sum of its proper divisors (1).

61296911657 is an equidigital number, since it uses as much as digits as its factorization.

61296911657 is an evil number, because the sum of its binary digits is even.

The product of its digits is 1224720, while the sum is 53.

The spelling of 61296911657 in words is "sixty-one billion, two hundred ninety-six million, nine hundred eleven thousand, six hundred fifty-seven".