1556055216 has 30 divisors (see below), whose sum is σ = 4354793820. Its totient is φ = 518685024.

The previous prime is 1556055211. The next prime is 1556055269. The reversal of 1556055216 is 6125506551.

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

It is not an unprimeable number, because it can be changed into a prime (1556055211) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 5402826 + ... + 5403113.

It is an arithmetic number, because the mean of its divisors is an integer number (145159794).

Almost surely, 2^1556055216 is an apocalyptic number.

1556055216 is a gapful number since it is divisible by the number (16) formed by its first and last digit.

It is an amenable number.

1556055216 is an abundant number, since it is smaller than the sum of its proper divisors (2798738604).

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

1556055216 is a wasteful number, since it uses less digits than its factorization.

1556055216 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10805953 (or 10805944 counting only the distinct ones).

The product of its (nonzero) digits is 45000, while the sum is 36.

The square root of 1556055216 is about 39446.8657310058. The cubic root of 1556055216 is about 1158.7995945161.

The spelling of 1556055216 in words is "one billion, five hundred fifty-six million, fifty-five thousand, two hundred sixteen".