851604852924 has 216 divisors, whose sum is σ = 2539419010128. Its totient is φ = 239910128640.

The previous prime is 851604852877. The next prime is 851604852941. The reversal of 851604852924 is 429258406158.

851604852924 is a `hidden beast` number, since 8 + 5 + 1 + 604 + 8 + 5 + 2 + 9 + 24 = 666.

851604852924 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 congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 71 ways as a sum of consecutive naturals, for example, 36268452 + ... + 36291924.

Almost surely, 2^851604852924 is an apocalyptic number.

851604852924 is a gapful number since it is divisible by the number (84) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 851604852924, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1269709505064).

851604852924 is an abundant number, since it is smaller than the sum of its proper divisors (1687814157204).

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

851604852924 is a wasteful number, since it uses less digits than its factorization.

851604852924 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 23785 (or 23773 counting only the distinct ones).

The product of its (nonzero) digits is 5529600, while the sum is 54.

The spelling of 851604852924 in words is "eight hundred fifty-one billion, six hundred four million, eight hundred fifty-two thousand, nine hundred twenty-four".