235791561656 has 16 divisors (see below), whose sum is σ = 505267632240. Its totient is φ = 101053526400.

The previous prime is 235791561619. The next prime is 235791561661. The reversal of 235791561656 is 656165197532.

It is a Harshad number since it is a multiple of its sum of digits (56), and also a Moran number because the ratio is a prime number: 4210563601 = 235791561656 / (2 + 3 + 5 + 7 + 9 + 1 + 5 + 6 + 1 + 6 + 5 + 6).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2105281745 + ... + 2105281856.

It is an arithmetic number, because the mean of its divisors is an integer number (31579227015).

Almost surely, 2^235791561656 is an apocalyptic number.

It is an amenable number.

235791561656 is an abundant number, since it is smaller than the sum of its proper divisors (269476070584).

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

235791561656 is a wasteful number, since it uses less digits than its factorization.

235791561656 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4210563614 (or 4210563610 counting only the distinct ones).

The product of its digits is 10206000, while the sum is 56.

The spelling of 235791561656 in words is "two hundred thirty-five billion, seven hundred ninety-one million, five hundred sixty-one thousand, six hundred fifty-six".