51100418978 has 16 divisors (see below), whose sum is σ = 87603923520. Its totient is φ = 21899378256.

The previous prime is 51100418959. The next prime is 51100419037. The reversal of 51100418978 is 87981400115.

It is a happy number.

51100418978 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a super-2 number, since 2×51100418978² (a number of 22 digits) contains 22 as substring.

It is a Curzon 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, 489053 + ... + 584271.

It is an arithmetic number, because the mean of its divisors is an integer number (5475245220).

Almost surely, 2^51100418978 is an apocalyptic number.

51100418978 is a deficient number, since it is larger than the sum of its proper divisors (36503504542).

51100418978 is a wasteful number, since it uses less digits than its factorization.

51100418978 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 133561.

The product of its (nonzero) digits is 80640, while the sum is 44.

The spelling of 51100418978 in words is "fifty-one billion, one hundred million, four hundred eighteen thousand, nine hundred seventy-eight".