51400874187 has 48 divisors (see below), whose sum is σ = 83790312480. Its totient is φ = 30957833664.

The previous prime is 51400874167. The next prime is 51400874201. The reversal of 51400874187 is 78147800415.

51400874187 is a `hidden beast` number, since 51 + 400 + 87 + 41 + 87 = 666.

It is not a de Polignac number, because 51400874187 - 2⁶ = 51400874123 is a prime.

It is not an unprimeable number, because it can be changed into a prime (51400874167) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 742213 + ... + 808505.

It is an arithmetic number, because the mean of its divisors is an integer number (1745631510).

Almost surely, 2^51400874187 is an apocalyptic number.

51400874187 is a deficient number, since it is larger than the sum of its proper divisors (32389438293).

51400874187 is a wasteful number, since it uses less digits than its factorization.

51400874187 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 66409 (or 66356 counting only the distinct ones).

The product of its (nonzero) digits is 250880, while the sum is 45.

The spelling of 51400874187 in words is "fifty-one billion, four hundred million, eight hundred seventy-four thousand, one hundred eighty-seven".