51573436992 has 672 divisors, whose sum is σ = 192508753920. Its totient is φ = 13252377600.

The previous prime is 51573436931. The next prime is 51573437011. The reversal of 51573436992 is 29963437515.

51573436992 is a `hidden beast` number, since 5 + 1 + 573 + 4 + 3 + 69 + 9 + 2 = 666.

It is a tau number, because it is divible by the number of its divisors (672).

It is a Harshad number since it is a multiple of its sum of digits (54).

It is an unprimeable number.

It is a polite number, since it can be written in 95 ways as a sum of consecutive naturals, for example, 244423767 + ... + 244423977.

It is an arithmetic number, because the mean of its divisors is an integer number (286471360).

Almost surely, 2^51573436992 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 51573436992, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (96254376960).

51573436992 is an abundant number, since it is smaller than the sum of its proper divisors (140935316928).

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

51573436992 is a wasteful number, since it uses less digits than its factorization.

51573436992 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 428 (or 401 counting only the distinct ones).

The product of its digits is 6123600, while the sum is 54.

The spelling of 51573436992 in words is "fifty-one billion, five hundred seventy-three million, four hundred thirty-six thousand, nine hundred ninety-two".