785664661552 has 20 divisors (see below), whose sum is σ = 1522415547016. Its totient is φ = 392783230080.

The previous prime is 785664661519. The next prime is 785664661577. The reversal of 785664661552 is 255166466587.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2936613 + ... + 3192964.

Almost surely, 2^785664661552 is an apocalyptic number.

It is an amenable number.

785664661552 is a deficient number, since it is larger than the sum of its proper divisors (736750885464).

785664661552 is a wasteful number, since it uses less digits than its factorization.

785664661552 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6137596 (or 6137590 counting only the distinct ones).

The product of its digits is 72576000, while the sum is 61.

The spelling of 785664661552 in words is "seven hundred eighty-five billion, six hundred sixty-four million, six hundred sixty-one thousand, five hundred fifty-two".