1001552257656 has 24 divisors (see below), whose sum is σ = 2712537364680. Its totient is φ = 333850752528.

The previous prime is 1001552257639. The next prime is 1001552257691. The reversal of 1001552257656 is 6567522551001.

1001552257656 is a `hidden beast` number, since 1 + 0 + 0 + 1 + 5 + 5 + 22 + 576 + 56 = 666.

It is a tau number, because it is divible by the number of its divisors (24).

It is a super-2 number, since 2×1001552257656² (a number of 25 digits) contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 6955223940 + ... + 6955224083.

It is an arithmetic number, because the mean of its divisors is an integer number (113022390195).

Almost surely, 2^{1001552257656} is an apocalyptic number.

It is an amenable number.

1001552257656 is an abundant number, since it is smaller than the sum of its proper divisors (1710985107024).

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

1001552257656 is a wasteful number, since it uses less digits than its factorization.

1001552257656 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13910448035 (or 13910448028 counting only the distinct ones).

The product of its (nonzero) digits is 630000, while the sum is 45.

The spelling of 1001552257656 in words is "one trillion, one billion, five hundred fifty-two million, two hundred fifty-seven thousand, six hundred fifty-six".