652778423856 has 90 divisors (see below), whose sum is σ = 1978211611428. Its totient is φ = 200854892160.

The previous prime is 652778423839. The next prime is 652778423933. The reversal of 652778423856 is 658324877256.

652778423856 is a `hidden beast` number, since 6 + 5 + 277 + 84 + 238 + 56 = 666.

It is a super-2 number, since 2×652778423856² (a number of 24 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 652778423793 and 652778423802.

It is an unprimeable number.

It is a polite number, since it can be written in 17 ways as a sum of consecutive naturals, for example, 13387450 + ... + 13436121.

Almost surely, 2^652778423856 is an apocalyptic number.

It is an amenable number.

652778423856 is an abundant number, since it is smaller than the sum of its proper divisors (1325433187572).

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

652778423856 is a wasteful number, since it uses less digits than its factorization.

652778423856 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 26823611 (or 26823589 counting only the distinct ones).

The product of its digits is 135475200, while the sum is 63.

The spelling of 652778423856 in words is "six hundred fifty-two billion, seven hundred seventy-eight million, four hundred twenty-three thousand, eight hundred fifty-six".