851620232124 has 36 divisors (see below), whose sum is σ = 2279336505264. Its totient is φ = 267174974592.

The previous prime is 851620232081. The next prime is 851620232143. The reversal of 851620232124 is 421232026158.

851620232124 is a `hidden beast` number, since 8 + 5 + 1 + 620 + 2 + 3 + 2 + 1 + 24 = 666.

851620232124 is digitally balanced in base 2 and base 4, because in such bases it contains all the possibile digits an equal number of times.

It is a tau number, because it is divible by the number of its divisors (36).

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 11 ways as a sum of consecutive naturals, for example, 695767552 + ... + 695768775.

It is an arithmetic number, because the mean of its divisors is an integer number (63314902924).

Almost surely, 2^851620232124 is an apocalyptic number.

It is an amenable number.

851620232124 is an abundant number, since it is smaller than the sum of its proper divisors (1427716273140).

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

851620232124 is a wasteful number, since it uses less digits than its factorization.

851620232124 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1391536354 (or 1391536349 counting only the distinct ones).

The product of its (nonzero) digits is 46080, while the sum is 36.

The spelling of 851620232124 in words is "eight hundred fifty-one billion, six hundred twenty million, two hundred thirty-two thousand, one hundred twenty-four".