1556698444 has 36 divisors (see below), whose sum is σ = 3171513744. Its totient is φ = 666626016.

The previous prime is 1556698417. The next prime is 1556698463. The reversal of 1556698444 is 4448966551.

It is a super-2 number, since 2×1556698444² = 4846620091104042272, which contains 22 as substring.

It is a Smith number, since the sum of its digits (52) coincides with the sum of the digits of its prime factors.

It is a junction number, because it is equal to n+sod(n) for n = 1556698391 and 1556698400.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 337377 + ... + 341959.

It is an arithmetic number, because the mean of its divisors is an integer number (88097604).

Almost surely, 2^1556698444 is an apocalyptic number.

1556698444 is a gapful number since it is divisible by the number (14) formed by its first and last digit.

It is an amenable number.

1556698444 is an abundant number, since it is smaller than the sum of its proper divisors (1614815300).

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

1556698444 is a wasteful number, since it uses less digits than its factorization.

1556698444 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6334 (or 6325 counting only the distinct ones).

The product of its digits is 4147200, while the sum is 52.

The square root of 1556698444 is about 39455.0179825076. The cubic root of 1556698444 is about 1158.9592438774.

The spelling of 1556698444 in words is "one billion, five hundred fifty-six million, six hundred ninety-eight thousand, four hundred forty-four".