655294018680 has 384 divisors, whose sum is σ = 2567151316800. Its totient is φ = 148236189696.

The previous prime is 655294018667. The next prime is 655294018699. The reversal of 655294018680 is 86810492556.

655294018680 is a `hidden beast` number, since 6 + 5 + 529 + 40 + 18 + 68 + 0 = 666.

It is a Harshad number since it is a multiple of its sum of digits (54).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 95 ways as a sum of consecutive naturals, for example, 5069412 + ... + 5197068.

Almost surely, 2^655294018680 is an apocalyptic number.

655294018680 is a gapful number since it is divisible by the number (60) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 655294018680, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1283575658400).

655294018680 is an abundant number, since it is smaller than the sum of its proper divisors (1911857298120).

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

655294018680 is a wasteful number, since it uses less digits than its factorization.

655294018680 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 127788 (or 127771 counting only the distinct ones).

The product of its (nonzero) digits is 4147200, while the sum is 54.

The spelling of 655294018680 in words is "six hundred fifty-five billion, two hundred ninety-four million, eighteen thousand, six hundred eighty".