1056556111551 has 16 divisors (see below), whose sum is σ = 1492080436224. Its totient is φ = 662727475584.

The previous prime is 1056556111453. The next prime is 1056556111553. The reversal of 1056556111551 is 1551116556501.

It is not a de Polignac number, because 1056556111551 - 2¹⁸ = 1056555849407 is a prime.

It is a super-2 number, since 2×1056556111551² (a number of 25 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1056556111553) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 3113551 + ... + 3436176.

It is an arithmetic number, because the mean of its divisors is an integer number (93255027264).

Almost surely, 2^{1056556111551} is an apocalyptic number.

1056556111551 is a deficient number, since it is larger than the sum of its proper divisors (435524324673).

1056556111551 is a wasteful number, since it uses less digits than its factorization.

1056556111551 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6552910.

The product of its (nonzero) digits is 112500, while the sum is 42.

The spelling of 1056556111551 in words is "one trillion, fifty-six billion, five hundred fifty-six million, one hundred eleven thousand, five hundred fifty-one".