61973275257 has 8 divisors (see below), whose sum is σ = 91812259680. Its totient is φ = 41315516820.

The previous prime is 61973275253. The next prime is 61973275291. The reversal of 61973275257 is 75257237916.

61973275257 is a `hidden beast` number, since 6 + 1 + 97 + 3 + 27 + 525 + 7 = 666.

It is not a de Polignac number, because 61973275257 - 2² = 61973275253 is a prime.

It is not an unprimeable number, because it can be changed into a prime (61973275253) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1147653219 + ... + 1147653272.

It is an arithmetic number, because the mean of its divisors is an integer number (11476532460).

Almost surely, 2^61973275257 is an apocalyptic number.

It is an amenable number.

61973275257 is a deficient number, since it is larger than the sum of its proper divisors (29838984423).

61973275257 is a wasteful number, since it uses less digits than its factorization.

61973275257 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2295306500 (or 2295306494 counting only the distinct ones).

The product of its digits is 5556600, while the sum is 54.

The spelling of 61973275257 in words is "sixty-one billion, nine hundred seventy-three million, two hundred seventy-five thousand, two hundred fifty-seven".