15820656242 has 16 divisors (see below), whose sum is σ = 24982470240. Its totient is φ = 7493249088.

The previous prime is 15820656239. The next prime is 15820656407. The reversal of 15820656242 is 24265602851.

It is a self number, because there is not a number n which added to its sum of digits gives 15820656242.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 637898 + ... + 662234.

It is an arithmetic number, because the mean of its divisors is an integer number (1561404390).

Almost surely, 2^15820656242 is an apocalyptic number.

15820656242 is a deficient number, since it is larger than the sum of its proper divisors (9161813998).

15820656242 is a wasteful number, since it uses less digits than its factorization.

15820656242 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 41465.

The product of its (nonzero) digits is 230400, while the sum is 41.

The spelling of 15820656242 in words is "fifteen billion, eight hundred twenty million, six hundred fifty-six thousand, two hundred forty-two".