51381851086 has 16 divisors (see below), whose sum is σ = 79166392560. Its totient is φ = 24993239040.

The previous prime is 51381851021. The next prime is 51381851173. The reversal of 51381851086 is 68015818315.

It is a congruent 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, 565966 + ... + 650446.

It is an arithmetic number, because the mean of its divisors is an integer number (4947899535).

Almost surely, 2^51381851086 is an apocalyptic number.

51381851086 is a deficient number, since it is larger than the sum of its proper divisors (27784541474).

51381851086 is a wasteful number, since it uses less digits than its factorization.

51381851086 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 92739.

The product of its (nonzero) digits is 230400, while the sum is 46.

The spelling of 51381851086 in words is "fifty-one billion, three hundred eighty-one million, eight hundred fifty-one thousand, eighty-six".