1251005136552 has 128 divisors (see below), whose sum is σ = 3712506240000. Its totient is φ = 389157835968.

The previous prime is 1251005136527. The next prime is 1251005136607. The reversal of 1251005136552 is 2556315001521.

1251005136552 is a `hidden beast` number, since 1 + 2 + 51 + 0 + 0 + 51 + 3 + 6 + 552 = 666.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 1999852 + ... + 2549787.

It is an arithmetic number, because the mean of its divisors is an integer number (29003955000).

Almost surely, 2^{1251005136552} is an apocalyptic number.

1251005136552 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

1251005136552 is an abundant number, since it is smaller than the sum of its proper divisors (2461501103448).

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

1251005136552 is a wasteful number, since it uses less digits than its factorization.

1251005136552 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4549740 (or 4549730 counting only the distinct ones).

The product of its (nonzero) digits is 45000, while the sum is 36.

The spelling of 1251005136552 in words is "one trillion, two hundred fifty-one billion, five million, one hundred thirty-six thousand, five hundred fifty-two".