61097457913 has 2 divisors, whose sum is σ = 61097457914. Its totient is φ = 61097457912.

The previous prime is 61097457851. The next prime is 61097458001. The reversal of 61097457913 is 31975479016.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 45102291129 + 15995166784 = 212373^2 + 126472^2 .

It is a cyclic number.

It is not a de Polignac number, because 61097457913 - 2²⁹ = 60560587001 is a prime.

It is not a weakly prime, because it can be changed into another prime (61097407913) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 30548728956 + 30548728957.

It is an arithmetic number, because the mean of its divisors is an integer number (30548728957).

Almost surely, 2^61097457913 is an apocalyptic number.

It is an amenable number.

61097457913 is a deficient number, since it is larger than the sum of its proper divisors (1).

61097457913 is an equidigital number, since it uses as much as digits as its factorization.

61097457913 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1428840, while the sum is 52.

The spelling of 61097457913 in words is "sixty-one billion, ninety-seven million, four hundred fifty-seven thousand, nine hundred thirteen".