655012680 has 192 divisors, whose sum is σ = 2301056640. Its totient is φ = 146116608.

The previous prime is 655012667. The next prime is 655012697. The reversal of 655012680 is 86210556.

It is a super-2 number, since 2×655012680² = 858083221921564800, which contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 1855384 + ... + 1855736.

It is an arithmetic number, because the mean of its divisors is an integer number (11984670).

Almost surely, 2^655012680 is an apocalyptic number.

655012680 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 655012680, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1150528320).

655012680 is an abundant number, since it is smaller than the sum of its proper divisors (1646043960).

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

655012680 is a wasteful number, since it uses less digits than its factorization.

655012680 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 468 (or 417 counting only the distinct ones).

The product of its (nonzero) digits is 14400, while the sum is 33.

The square root of 655012680 is about 25593.2155072394. The cubic root of 655012680 is about 868.4601643087.

The spelling of 655012680 in words is "six hundred fifty-five million, twelve thousand, six hundred eighty".