656430426280 has 32 divisors (see below), whose sum is σ = 1477076277600. Its totient is φ = 262553002816.

The previous prime is 656430426233. The next prime is 656430426287. The reversal of 656430426280 is 82624034656.

It is a super-2 number, since 2×656430426280² (a number of 24 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 656430426280.

It is not an unprimeable number, because it can be changed into a prime (656430426287) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 37702 + ... + 1146421.

It is an arithmetic number, because the mean of its divisors is an integer number (46158633675).

Almost surely, 2^656430426280 is an apocalyptic number.

It is an amenable number.

656430426280 is an abundant number, since it is smaller than the sum of its proper divisors (820645851320).

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

656430426280 is a wasteful number, since it uses less digits than its factorization.

656430426280 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1197993 (or 1197989 counting only the distinct ones).

The product of its (nonzero) digits is 1658880, while the sum is 46.

The spelling of 656430426280 in words is "six hundred fifty-six billion, four hundred thirty million, four hundred twenty-six thousand, two hundred eighty".