1615516656 has 40 divisors (see below), whose sum is σ = 4494451920. Its totient is φ = 497081856.

The previous prime is 1615516633. The next prime is 1615516699. The reversal of 1615516656 is 6566155161.

It is a congruent number.

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, 1293861 + ... + 1295108.

It is an arithmetic number, because the mean of its divisors is an integer number (112361298).

Almost surely, 2^1615516656 is an apocalyptic number.

1615516656 is a gapful number since it is divisible by the number (16) formed by its first and last digit.

It is an amenable number.

1615516656 is an abundant number, since it is smaller than the sum of its proper divisors (2878935264).

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

1615516656 is a wasteful number, since it uses less digits than its factorization.

1615516656 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2588993 (or 2588987 counting only the distinct ones).

The product of its digits is 162000, while the sum is 42.

The square root of 1615516656 is about 40193.4902191885. The cubic root of 1615516656 is about 1173.3758531710.

The spelling of 1615516656 in words is "one billion, six hundred fifteen million, five hundred sixteen thousand, six hundred fifty-six".