2015656394 has 24 divisors (see below), whose sum is σ = 3153212544. Its totient is φ = 965358000.

The previous prime is 2015656343. The next prime is 2015656403. The reversal of 2015656394 is 4936565102.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 630869 + ... + 634055.

It is an arithmetic number, because the mean of its divisors is an integer number (131383856).

Almost surely, 2^2015656394 is an apocalyptic number.

2015656394 is a deficient number, since it is larger than the sum of its proper divisors (1137556150).

2015656394 is a wasteful number, since it uses less digits than its factorization.

2015656394 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3422 (or 3321 counting only the distinct ones).

The product of its (nonzero) digits is 194400, while the sum is 41.

The square root of 2015656394 is about 44896.0621213041. The cubic root of 2015656394 is about 1263.2001449820.

The spelling of 2015656394 in words is "two billion, fifteen million, six hundred fifty-six thousand, three hundred ninety-four".