656213215542 has 8 divisors (see below), whose sum is σ = 1312426431096. Its totient is φ = 218737738512.

The previous prime is 656213215529. The next prime is 656213215549. The reversal of 656213215542 is 245512312656.

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

656213215542 is an admirable number.

It is a junction number, because it is equal to n+sod(n) for n = 656213215494 and 656213215503.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (656213215549) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 54684434623 + ... + 54684434634.

It is an arithmetic number, because the mean of its divisors is an integer number (164053303887).

Almost surely, 2^656213215542 is an apocalyptic number.

656213215542 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

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

656213215542 is a wasteful number, since it uses less digits than its factorization.

656213215542 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 109368869262.

The product of its digits is 432000, while the sum is 42.

The spelling of 656213215542 in words is "six hundred fifty-six billion, two hundred thirteen million, two hundred fifteen thousand, five hundred forty-two".