656454634236123 has 8 divisors (see below), whose sum is σ = 875354107676736. Its totient is φ = 437595791809800.

The previous prime is 656454634235879. The next prime is 656454634236221. The reversal of 656454634236123 is 321632436454656.

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

It is not a de Polignac number, because 656454634236123 - 2¹⁸ = 656454633973979 is a prime.

It is a super-2 number, since 2×656454634236123² (a number of 30 digits) contains 22 as substring.

It is a Smith number, since the sum of its digits (60) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is not an unprimeable number, because it can be changed into a prime (656454634236223) 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, 10157715873 + ... + 10157780498.

It is an arithmetic number, because the mean of its divisors is an integer number (109419263459592).

Almost surely, 2^{656454634236123} is an apocalyptic number.

656454634236123 is a deficient number, since it is larger than the sum of its proper divisors (218899473440613).

656454634236123 is a wasteful number, since it uses less digits than its factorization.

656454634236123 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 20315507145.

The product of its digits is 223948800, while the sum is 60.

The spelling of 656454634236123 in words is "six hundred fifty-six trillion, four hundred fifty-four billion, six hundred thirty-four million, two hundred thirty-six thousand, one hundred twenty-three".