1516556990 has 96 divisors (see below), whose sum is σ = 3078124416. Its totient is φ = 537338880.

The previous prime is 1516556971. The next prime is 1516557017. The reversal of 1516556990 is 996556151.

It is a Harshad number since it is a multiple of its sum of digits (47).

It is a Curzon number.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 4845074 + ... + 4845386.

It is an arithmetic number, because the mean of its divisors is an integer number (32063796).

Almost surely, 2^1516556990 is an apocalyptic number.

1516556990 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

1516556990 is an abundant number, since it is smaller than the sum of its proper divisors (1561567426).

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

1516556990 is a wasteful number, since it uses less digits than its factorization.

1516556990 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 454 (or 441 counting only the distinct ones).

The product of its (nonzero) digits is 364500, while the sum is 47.

The square root of 1516556990 is about 38942.9966746269. The cubic root of 1516556990 is about 1148.9106230706.

The spelling of 1516556990 in words is "one billion, five hundred sixteen million, five hundred fifty-six thousand, nine hundred ninety".