656400212351 has 8 divisors (see below), whose sum is σ = 720230132160. Its totient is φ = 594475663392.

The previous prime is 656400212339. The next prime is 656400212353. The reversal of 656400212351 is 153212004656.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 656400212351 - 2¹⁴ = 656400195967 is a prime.

It is a super-2 number, since 2×656400212351² (a number of 24 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (656400212353) 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, 476341991 + ... + 476343368.

It is an arithmetic number, because the mean of its divisors is an integer number (90028766520).

Almost surely, 2^656400212351 is an apocalyptic number.

656400212351 is a deficient number, since it is larger than the sum of its proper divisors (63829919809).

656400212351 is a wasteful number, since it uses less digits than its factorization.

656400212351 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 952685425.

The product of its (nonzero) digits is 43200, while the sum is 35.

The spelling of 656400212351 in words is "six hundred fifty-six billion, four hundred million, two hundred twelve thousand, three hundred fifty-one".