51940052278 has 16 divisors (see below), whose sum is σ = 82306692720. Its totient is φ = 24514357536.

The previous prime is 51940052273. The next prime is 51940052321. The reversal of 51940052278 is 87225004915.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (51940052273) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2456701 + ... + 2477752.

It is an arithmetic number, because the mean of its divisors is an integer number (5144168295).

Almost surely, 2^51940052278 is an apocalyptic number.

51940052278 is a deficient number, since it is larger than the sum of its proper divisors (30366640442).

51940052278 is a wasteful number, since it uses less digits than its factorization.

51940052278 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4934751.

The product of its (nonzero) digits is 201600, while the sum is 43.

The spelling of 51940052278 in words is "fifty-one billion, nine hundred forty million, fifty-two thousand, two hundred seventy-eight".