656012216601 has 32 divisors (see below), whose sum is σ = 1159000197120. Its totient is φ = 358565681232.

The previous prime is 656012216581. The next prime is 656012216621. The reversal of 656012216601 is 106612210656.

656012216601 is a `hidden beast` number, since 6 + 560 + 1 + 22 + 16 + 60 + 1 = 666.

It is an interprime number because it is at equal distance from previous prime (656012216581) and next prime (656012216621).

It is not a de Polignac number, because 656012216601 - 2²¹ = 656010119449 is a prime.

It is not an unprimeable number, because it can be changed into a prime (656012216621) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 75451395 + ... + 75460088.

It is an arithmetic number, because the mean of its divisors is an integer number (36218756160).

Almost surely, 2^656012216601 is an apocalyptic number.

It is an amenable number.

656012216601 is a deficient number, since it is larger than the sum of its proper divisors (502987980519).

656012216601 is a wasteful number, since it uses less digits than its factorization.

656012216601 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 150911522 (or 150911516 counting only the distinct ones).

The product of its (nonzero) digits is 25920, while the sum is 36.

The spelling of 656012216601 in words is "six hundred fifty-six billion, twelve million, two hundred sixteen thousand, six hundred one".