51468525990 has 48 divisors (see below), whose sum is σ = 152935050528. Its totient is φ = 11764234368.

The previous prime is 51468525971. The next prime is 51468526013. The reversal of 51468525990 is 9952586415.

51468525990 is a `hidden beast` number, since 5 + 1 + 46 + 8 + 5 + 2 + 599 + 0 = 666.

It is a super-3 number, since 3×51468525990³ (a number of 33 digits) contains 333 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 40847407 + ... + 40848666.

It is an arithmetic number, because the mean of its divisors is an integer number (3186146886).

Almost surely, 2^51468525990 is an apocalyptic number.

51468525990 is an abundant number, since it is smaller than the sum of its proper divisors (101466524538).

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

51468525990 is a wasteful number, since it uses less digits than its factorization.

51468525990 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 81696093 (or 81696090 counting only the distinct ones).

The product of its (nonzero) digits is 3888000, while the sum is 54.

The spelling of 51468525990 in words is "fifty-one billion, four hundred sixty-eight million, five hundred twenty-five thousand, nine hundred ninety".