851285311536 has 40 divisors (see below), whose sum is σ = 2399076788544. Its totient is φ = 257965245760.

The previous prime is 851285311529. The next prime is 851285311603. The reversal of 851285311536 is 635113582158.

It is a Harshad number since it is a multiple of its sum of digits (48).

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 806140866 + ... + 806141921.

Almost surely, 2^851285311536 is an apocalyptic number.

It is an amenable number.

851285311536 is an abundant number, since it is smaller than the sum of its proper divisors (1547791477008).

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

851285311536 is a wasteful number, since it uses less digits than its factorization.

851285311536 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1612282809 (or 1612282803 counting only the distinct ones).

The product of its digits is 864000, while the sum is 48.

The spelling of 851285311536 in words is "eight hundred fifty-one billion, two hundred eighty-five million, three hundred eleven thousand, five hundred thirty-six".