2251172654056 has 8 divisors (see below), whose sum is σ = 4220948726370. Its totient is φ = 1125586327024.

The previous prime is 2251172654011. The next prime is 2251172654089. The reversal of 2251172654056 is 6504562711522.

It is a happy number.

It can be written as a sum of positive squares in only one way, i.e., 1243425708100 + 1007746945956 = 1115090^2 + 1003866^2 .

It is a tau number, because it is divible by the number of its divisors (8).

It is a super-2 number, since 2×2251172654056² (a number of 26 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 2251172653997 and 2251172654015.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 140698290871 + ... + 140698290886.

Almost surely, 2^{2251172654056} is an apocalyptic number.

It is an amenable number.

2251172654056 is a deficient number, since it is larger than the sum of its proper divisors (1969776072314).

2251172654056 is a wasteful number, since it uses less digits than its factorization.

2251172654056 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 281396581763 (or 281396581759 counting only the distinct ones).

The product of its (nonzero) digits is 1008000, while the sum is 46.

The spelling of 2251172654056 in words is "two trillion, two hundred fifty-one billion, one hundred seventy-two million, six hundred fifty-four thousand, fifty-six".