51047450878 has 16 divisors (see below), whose sum is σ = 79911528480. Its totient is φ = 24410585056.

The previous prime is 51047450869. The next prime is 51047450897. The reversal of 51047450878 is 87805474015.

It is a super-2 number, since 2×51047450878² (a number of 22 digits) contains 22 as substring.

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, 271968 + ... + 419596.

It is an arithmetic number, because the mean of its divisors is an integer number (4994470530).

Almost surely, 2^51047450878 is an apocalyptic number.

51047450878 is a deficient number, since it is larger than the sum of its proper divisors (28864077602).

51047450878 is a wasteful number, since it uses less digits than its factorization.

51047450878 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 155171.

The product of its (nonzero) digits is 1254400, while the sum is 49.

The spelling of 51047450878 in words is "fifty-one billion, forty-seven million, four hundred fifty thousand, eight hundred seventy-eight".