51437522520 has 384 divisors, whose sum is σ = 179136921600. Its totient is φ = 12777523200.

The previous prime is 51437522509. The next prime is 51437522537. The reversal of 51437522520 is 2522573415.

51437522520 is a `hidden beast` number, since 5 + 1 + 43 + 75 + 22 + 520 = 666.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a congruent number.

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, 36146529 + ... + 36147951.

It is an arithmetic number, because the mean of its divisors is an integer number (466502400).

Almost surely, 2^51437522520 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 51437522520, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (89568460800).

51437522520 is an abundant number, since it is smaller than the sum of its proper divisors (127699399080).

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

51437522520 is a wasteful number, since it uses less digits than its factorization.

51437522520 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1591 (or 1584 counting only the distinct ones).

The product of its (nonzero) digits is 84000, while the sum is 36.

The spelling of 51437522520 in words is "fifty-one billion, four hundred thirty-seven million, five hundred twenty-two thousand, five hundred twenty".