655795977408 has 896 divisors, whose sum is σ = 2326067788800. Its totient is φ = 178561843200.

The previous prime is 655795977377. The next prime is 655795977451. The reversal of 655795977408 is 804779597556.

655795977408 is a `hidden beast` number, since 6 + 5 + 579 + 5 + 9 + 7 + 7 + 40 + 8 = 666.

It is a Harshad number since it is a multiple of its sum of digits (72).

It is an unprimeable number.

It is a polite number, since it can be written in 127 ways as a sum of consecutive naturals, for example, 2095194660 + ... + 2095194972.

It is an arithmetic number, because the mean of its divisors is an integer number (2596057800).

Almost surely, 2^655795977408 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 655795977408, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1163033894400).

655795977408 is an abundant number, since it is smaller than the sum of its proper divisors (1670271811392).

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

655795977408 is a wasteful number, since it uses less digits than its factorization.

655795977408 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 558 (or 542 counting only the distinct ones).

The product of its (nonzero) digits is 666792000, while the sum is 72.

The spelling of 655795977408 in words is "six hundred fifty-five billion, seven hundred ninety-five million, nine hundred seventy-seven thousand, four hundred eight".