1515116556 has 48 divisors (see below), whose sum is σ = 3942650880. Its totient is φ = 503165520.

The previous prime is 1515116521. The next prime is 1515116557. The reversal of 1515116556 is 6556115151.

It is a happy number.

1515116556 is a `hidden beast` number, since 1 + 51 + 51 + 1 + 6 + 556 = 666.

It is a super-2 number, since 2×1515116556² = 4591156356530602272, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a self number, because there is not a number n which added to its sum of digits gives 1515116556.

It is not an unprimeable number, because it can be changed into a prime (1515116557) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 3385 + ... + 55151.

It is an arithmetic number, because the mean of its divisors is an integer number (82138560).

Almost surely, 2^1515116556 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1515116556, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1971325440).

1515116556 is an abundant number, since it is smaller than the sum of its proper divisors (2427534324).

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

1515116556 is a wasteful number, since it uses less digits than its factorization.

1515116556 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 52051 (or 52043 counting only the distinct ones).

The product of its digits is 22500, while the sum is 36.

The square root of 1515116556 is about 38924.4981470539. The cubic root of 1515116556 is about 1148.5467606802.

The spelling of 1515116556 in words is "one billion, five hundred fifteen million, one hundred sixteen thousand, five hundred fifty-six".