656378624271 has 8 divisors (see below), whose sum is σ = 875175531520. Its totient is φ = 437583733272.

The previous prime is 656378624249. The next prime is 656378624323. The reversal of 656378624271 is 172426873656.

It is a happy number.

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

It is not a de Polignac number, because 656378624271 - 2¹⁰ = 656378623247 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (656378624071) 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, 602706 + ... + 1294608.

It is an arithmetic number, because the mean of its divisors is an integer number (109396941440).

Almost surely, 2^656378624271 is an apocalyptic number.

656378624271 is a deficient number, since it is larger than the sum of its proper divisors (218796907249).

656378624271 is a wasteful number, since it uses less digits than its factorization.

656378624271 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1008125.

The product of its digits is 20321280, while the sum is 57.

The spelling of 656378624271 in words is "six hundred fifty-six billion, three hundred seventy-eight million, six hundred twenty-four thousand, two hundred seventy-one".