501609156120 has 384 divisors, whose sum is σ = 1718118604800. Its totient is φ = 126751564800.

The previous prime is 501609156049. The next prime is 501609156263. The reversal of 501609156120 is 21651906105.

501609156120 is a `hidden beast` number, since 5 + 0 + 1 + 6 + 0 + 91 + 561 + 2 + 0 = 666.

It is a super-2 number, since 2×501609156120² (a number of 24 digits) contains 22 as substring.

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, 162700099 + ... + 162703181.

It is an arithmetic number, because the mean of its divisors is an integer number (4474267200).

Almost surely, 2^501609156120 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 501609156120, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (859059302400).

501609156120 is an abundant number, since it is smaller than the sum of its proper divisors (1216509448680).

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

501609156120 is a wasteful number, since it uses less digits than its factorization.

501609156120 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3431 (or 3424 counting only the distinct ones).

The product of its (nonzero) digits is 16200, while the sum is 36.

The spelling of 501609156120 in words is "five hundred one billion, six hundred nine million, one hundred fifty-six thousand, one hundred twenty".