51180386978 has 16 divisors (see below), whose sum is σ = 87746561280. Its totient is φ = 21932262816.

The previous prime is 51180386969. The next prime is 51180386981. The reversal of 51180386978 is 87968308115.

It is a super-2 number, since 2×51180386978² (a number of 22 digits) contains 22 as substring.

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, 32858 + ... + 321621.

It is an arithmetic number, because the mean of its divisors is an integer number (5484160080).

Almost surely, 2^51180386978 is an apocalyptic number.

51180386978 is a deficient number, since it is larger than the sum of its proper divisors (36566174302).

51180386978 is a wasteful number, since it uses less digits than its factorization.

51180386978 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 364801.

The product of its (nonzero) digits is 2903040, while the sum is 56.

The spelling of 51180386978 in words is "fifty-one billion, one hundred eighty million, three hundred eighty-six thousand, nine hundred seventy-eight".