251555606555152 has 10 divisors (see below), whose sum is σ = 487388987700638. Its totient is φ = 125777803277568.

The previous prime is 251555606555009. The next prime is 251555606555219.

251555606555152 is nontrivially palindromic in base 10.

It can be written as a sum of positive squares in only one way, i.e., 248282922944016 + 3272683611136 = 15756996^2 + 1809056^2 .

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 7861112704833 + ... + 7861112704864.

Almost surely, 2^{251555606555152} is an apocalyptic number.

It is an amenable number.

251555606555152 is a deficient number, since it is larger than the sum of its proper divisors (235833381145486).

251555606555152 is a wasteful number, since it uses less digits than its factorization.

251555606555152 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15722225409705 (or 15722225409699 counting only the distinct ones).

The product of its (nonzero) digits is 56250000, while the sum is 58.

The spelling of 251555606555152 in words is "two hundred fifty-one trillion, five hundred fifty-five billion, six hundred six million, five hundred fifty-five thousand, one hundred fifty-two".