51686054392 has 32 divisors (see below), whose sum is σ = 110993051520. Its totient is φ = 22103722080.

The previous prime is 51686054383. The next prime is 51686054417. The reversal of 51686054392 is 29345068615.

It is a super-2 number, since 2×51686054392² (a number of 22 digits) contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 962034 + ... + 1014337.

It is an arithmetic number, because the mean of its divisors is an integer number (3468532860).

Almost surely, 2^51686054392 is an apocalyptic number.

It is an amenable number.

51686054392 is an abundant number, since it is smaller than the sum of its proper divisors (59306997128).

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

51686054392 is a wasteful number, since it uses less digits than its factorization.

51686054392 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1976851 (or 1976847 counting only the distinct ones).

The product of its (nonzero) digits is 1555200, while the sum is 49.

The spelling of 51686054392 in words is "fifty-one billion, six hundred eighty-six million, fifty-four thousand, three hundred ninety-two".