1156066556556 has 24 divisors (see below), whose sum is σ = 2734440533104. Its totient is φ = 380076675840.

The previous prime is 1156066556549. The next prime is 1156066556591. The reversal of 1156066556556 is 6556556606511.

It is a super-2 number, since 2×1156066556556² (a number of 25 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 1156066556496 and 1156066556505.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 659854465 + ... + 659856216.

Almost surely, 2^{1156066556556} is an apocalyptic number.

It is an amenable number.

1156066556556 is an abundant number, since it is smaller than the sum of its proper divisors (1578373976548).

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

1156066556556 is a wasteful number, since it uses less digits than its factorization.

1156066556556 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1319710761 (or 1319710759 counting only the distinct ones).

The product of its (nonzero) digits is 24300000, while the sum is 57.

The spelling of 1156066556556 in words is "one trillion, one hundred fifty-six billion, sixty-six million, five hundred fifty-six thousand, five hundred fifty-six".