51356951886 has 32 divisors (see below), whose sum is σ = 104072613120. Its totient is φ = 16894008576.

The previous prime is 51356951881. The next prime is 51356951963. The reversal of 51356951886 is 68815965315.

It is a happy number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (51356951881) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 45091 + ... + 323646.

It is an arithmetic number, because the mean of its divisors is an integer number (3252269160).

Almost surely, 2^51356951886 is an apocalyptic number.

51356951886 is an abundant number, since it is smaller than the sum of its proper divisors (52715661234).

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

51356951886 is a wasteful number, since it uses less digits than its factorization.

51356951886 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 369048.

The product of its digits is 7776000, while the sum is 57.

The spelling of 51356951886 in words is "fifty-one billion, three hundred fifty-six million, nine hundred fifty-one thousand, eight hundred eighty-six".