51637873990 has 16 divisors (see below), whose sum is σ = 94925794752. Its totient is φ = 20215678144.

The previous prime is 51637873961. The next prime is 51637874039. The reversal of 51637873990 is 9937873615.

It is a happy number.

51637873990 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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, 54933439 + ... + 54934378.

It is an arithmetic number, because the mean of its divisors is an integer number (5932862172).

Almost surely, 2^51637873990 is an apocalyptic number.

51637873990 is a deficient number, since it is larger than the sum of its proper divisors (43287920762).

51637873990 is a wasteful number, since it uses less digits than its factorization.

51637873990 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 109867871.

The product of its (nonzero) digits is 8573040, while the sum is 58.

The spelling of 51637873990 in words is "fifty-one billion, six hundred thirty-seven million, eight hundred seventy-three thousand, nine hundred ninety".