776643621852 has 48 divisors (see below), whose sum is σ = 2099420218112. Its totient is φ = 218858474880.

The previous prime is 776643621823. The next prime is 776643621877. The reversal of 776643621852 is 258126346677.

It is a happy number.

It is a junction number, because it is equal to n+sod(n) for n = 776643621792 and 776643621801.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 63320974 + ... + 63333237.

Almost surely, 2^776643621852 is an apocalyptic number.

It is an amenable number.

776643621852 is an abundant number, since it is smaller than the sum of its proper divisors (1322776596260).

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

776643621852 is a wasteful number, since it uses less digits than its factorization.

776643621852 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 126654298 (or 126654296 counting only the distinct ones).

The product of its digits is 20321280, while the sum is 57.

The spelling of 776643621852 in words is "seven hundred seventy-six billion, six hundred forty-three million, six hundred twenty-one thousand, eight hundred fifty-two".