1000556011506 has 16 divisors (see below), whose sum is σ = 2001126037248. Its totient is φ = 333516334800.

The previous prime is 1000556011489. The next prime is 1000556011513. The reversal of 1000556011506 is 6051106550001.

It is a super-2 number, since 2×1000556011506² (a number of 25 digits) contains 22 as substring.

It is a Curzon number.

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, 498591 + ... + 1499901.

It is an arithmetic number, because the mean of its divisors is an integer number (125070377328).

Almost surely, 2^{1000556011506} is an apocalyptic number.

1000556011506 is an abundant number, since it is smaller than the sum of its proper divisors (1000570025742).

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

1000556011506 is a wasteful number, since it uses less digits than its factorization.

1000556011506 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1167857.

The product of its (nonzero) digits is 4500, while the sum is 30.

The spelling of 1000556011506 in words is "one trillion, five hundred fifty-six million, eleven thousand, five hundred six".