61212254257 has 64 divisors (see below), whose sum is σ = 82362728448. Its totient is φ = 44066880000.

The previous prime is 61212254249. The next prime is 61212254261. The reversal of 61212254257 is 75245221216.

It is not a de Polignac number, because 61212254257 - 2³ = 61212254249 is a prime.

It is a super-2 number, since 2×61212254257² (a number of 22 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (61212251257) by changing a digit.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 47049507 + ... + 47050807.

It is an arithmetic number, because the mean of its divisors is an integer number (1286917632).

Almost surely, 2^61212254257 is an apocalyptic number.

It is an amenable number.

61212254257 is a deficient number, since it is larger than the sum of its proper divisors (21150474191).

61212254257 is a wasteful number, since it uses less digits than its factorization.

61212254257 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2230.

The product of its digits is 67200, while the sum is 37.

The spelling of 61212254257 in words is "sixty-one billion, two hundred twelve million, two hundred fifty-four thousand, two hundred fifty-seven".