51492373920 has 480 divisors, whose sum is σ = 202037552640. Its totient is φ = 12264929280.

The previous prime is 51492373883. The next prime is 51492373943. The reversal of 51492373920 is 2937329415.

51492373920 is a `hidden beast` number, since 5 + 1 + 492 + 3 + 73 + 92 + 0 = 666.

It is a tau number, because it is divible by the number of its divisors (480).

It is a Harshad number since it is a multiple of its sum of digits (45).

It is an unprimeable number.

It is a polite number, since it can be written in 79 ways as a sum of consecutive naturals, for example, 5217951 + ... + 5227809.

It is an arithmetic number, because the mean of its divisors is an integer number (420911568).

Almost surely, 2^51492373920 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 51492373920, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (101018776320).

51492373920 is an abundant number, since it is smaller than the sum of its proper divisors (150545178720).

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

51492373920 is a wasteful number, since it uses less digits than its factorization.

51492373920 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9930 (or 9913 counting only the distinct ones).

The product of its (nonzero) digits is 408240, while the sum is 45.

The spelling of 51492373920 in words is "fifty-one billion, four hundred ninety-two million, three hundred seventy-three thousand, nine hundred twenty".