1556513652 has 12 divisors (see below), whose sum is σ = 3631865216. Its totient is φ = 518837880.

The previous prime is 1556513603. The next prime is 1556513671. The reversal of 1556513652 is 2563156551.

It is a tau number, because it is divible by the number of its divisors (12).

It is a self number, because there is not a number n which added to its sum of digits gives 1556513652.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 64854724 + ... + 64854747.

Almost surely, 2^1556513652 is an apocalyptic number.

1556513652 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

1556513652 is an abundant number, since it is smaller than the sum of its proper divisors (2075351564).

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

1556513652 is a wasteful number, since it uses less digits than its factorization.

1556513652 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 129709478 (or 129709476 counting only the distinct ones).

The product of its digits is 135000, while the sum is 39.

The square root of 1556513652 is about 39452.6761069512. The cubic root of 1556513652 is about 1158.9133829567.

The spelling of 1556513652 in words is "one billion, five hundred fifty-six million, five hundred thirteen thousand, six hundred fifty-two".