656406031452 has 48 divisors (see below), whose sum is σ = 1549830885120. Its totient is φ = 216202808448.

The previous prime is 656406031423. The next prime is 656406031459. The reversal of 656406031452 is 254130604656.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (656406031459) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1448763 + ... + 1847085.

It is an arithmetic number, because the mean of its divisors is an integer number (32288143440).

Almost surely, 2^656406031452 is an apocalyptic number.

It is an amenable number.

656406031452 is an abundant number, since it is smaller than the sum of its proper divisors (893424853668).

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

656406031452 is a wasteful number, since it uses less digits than its factorization.

656406031452 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 399962 (or 399960 counting only the distinct ones).

The product of its (nonzero) digits is 518400, while the sum is 42.

The spelling of 656406031452 in words is "six hundred fifty-six billion, four hundred six million, thirty-one thousand, four hundred fifty-two".