677798388456 has 64 divisors (see below), whose sum is σ = 1936628244480. Its totient is φ = 193650540480.

The previous prime is 677798388439. The next prime is 677798388469. The reversal of 677798388456 is 654883897776.

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, 9424425 + ... + 9496071.

It is an arithmetic number, because the mean of its divisors is an integer number (30259816320).

Almost surely, 2^677798388456 is an apocalyptic number.

It is an amenable number.

677798388456 is an abundant number, since it is smaller than the sum of its proper divisors (1258829856024).

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

677798388456 is a wasteful number, since it uses less digits than its factorization.

677798388456 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 127974 (or 127970 counting only the distinct ones).

The product of its digits is 3413975040, while the sum is 78.

The spelling of 677798388456 in words is "six hundred seventy-seven billion, seven hundred ninety-eight million, three hundred eighty-eight thousand, four hundred fifty-six".