51909848958 has 16 divisors (see below), whose sum is σ = 113257852416. Its totient is φ = 15730257240.

The previous prime is 51909848941. The next prime is 51909848981. The reversal of 51909848958 is 85984890915.

It is a Harshad number since it is a multiple of its sum of digits (66), and also a Moran number because the ratio is a prime number: 786512863 = 51909848958 / (5 + 1 + 9 + 0 + 9 + 8 + 4 + 8 + 9 + 5 + 8).

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 393256366 + ... + 393256497.

It is an arithmetic number, because the mean of its divisors is an integer number (7078615776).

Almost surely, 2^51909848958 is an apocalyptic number.

51909848958 is an abundant number, since it is smaller than the sum of its proper divisors (61348003458).

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

51909848958 is a wasteful number, since it uses less digits than its factorization.

51909848958 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 786512879.

The product of its (nonzero) digits is 37324800, while the sum is 66.

The spelling of 51909848958 in words is "fifty-one billion, nine hundred nine million, eight hundred forty-eight thousand, nine hundred fifty-eight".