1251554255488 has 32 divisors (see below), whose sum is σ = 2515395646260. Its totient is φ = 620239269888.

The previous prime is 1251554255423. The next prime is 1251554255521. The reversal of 1251554255488 is 8845524551521.

It can be written as a sum of positive squares in 2 ways, for example, as 1237060021824 + 14494233664 = 1112232^2 + 120392^2 .

It is a tau number, because it is divible by the number of its divisors (32).

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 43249995 + ... + 43278922.

Almost surely, 2^{1251554255488} is an apocalyptic number.

It is an amenable number.

1251554255488 is an abundant number, since it is smaller than the sum of its proper divisors (1263841390772).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

1251554255488 is an equidigital number, since it uses as much as digits as its factorization.

1251554255488 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 86529044 (or 86529032 counting only the distinct ones).

The product of its digits is 12800000, while the sum is 55.

The spelling of 1251554255488 in words is "one trillion, two hundred fifty-one billion, five hundred fifty-four million, two hundred fifty-five thousand, four hundred eighty-eight".