51566511006 has 64 divisors (see below), whose sum is σ = 116445288960. Its totient is φ = 16911512640.

The previous prime is 51566510981. The next prime is 51566511049. The reversal of 51566511006 is 60011566515.

It is a congruent number.

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, 3092311 + ... + 3108941.

It is an arithmetic number, because the mean of its divisors is an integer number (1819457640).

Almost surely, 2^51566511006 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 51566511006, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (58222644480).

51566511006 is an abundant number, since it is smaller than the sum of its proper divisors (64878777954).

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

51566511006 is a wasteful number, since it uses less digits than its factorization.

51566511006 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 17566 (or 17560 counting only the distinct ones).

The product of its (nonzero) digits is 27000, while the sum is 36.

The spelling of 51566511006 in words is "fifty-one billion, five hundred sixty-six million, five hundred eleven thousand, six".