51451964154 has 28 divisors (see below), whose sum is σ = 115713988506. Its totient is φ = 17150654232.

The previous prime is 51451964143. The next prime is 51451964177. The reversal of 51451964154 is 45146915415.

51451964154 is a `hidden beast` number, since 5 + 1 + 45 + 196 + 415 + 4 = 666.

It can be written as a sum of positive squares in only one way, i.e., 51450487929 + 1476225 = 226827^2 + 1215^2 .

It is an unprimeable number.

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 13 ways as a sum of consecutive naturals, for example, 17643249 + ... + 17646164.

Almost surely, 2^51451964154 is an apocalyptic number.

51451964154 is a gapful number since it is divisible by the number (54) formed by its first and last digit.

51451964154 is an abundant number, since it is smaller than the sum of its proper divisors (64262024352).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

51451964154 is an equidigital number, since it uses as much as digits as its factorization.

51451964154 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 35289433 (or 35289418 counting only the distinct ones).

The product of its digits is 432000, while the sum is 45.

The spelling of 51451964154 in words is "fifty-one billion, four hundred fifty-one million, nine hundred sixty-four thousand, one hundred fifty-four".