51011055008 has 48 divisors (see below), whose sum is σ = 102774420000. Its totient is φ = 24913863936.

The previous prime is 51011055001. The next prime is 51011055047. The reversal of 51011055008 is 80055011015.

It is not an unprimeable number, because it can be changed into a prime (51011055001) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 318743 + ... + 451241.

It is an arithmetic number, because the mean of its divisors is an integer number (2141133750).

Almost surely, 2^51011055008 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 51011055008, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (51387210000).

51011055008 is an abundant number, since it is smaller than the sum of its proper divisors (51763364992).

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

51011055008 is a wasteful number, since it uses less digits than its factorization.

51011055008 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 132789 (or 132781 counting only the distinct ones).

The product of its (nonzero) digits is 1000, while the sum is 26.

The spelling of 51011055008 in words is "fifty-one billion, eleven million, fifty-five thousand, eight".