2138553556 has 24 divisors (see below), whose sum is σ = 3964766400. Its totient is φ = 1005831552.

The previous prime is 2138553541. The next prime is 2138553577. The reversal of 2138553556 is 6553558312.

It is a super-2 number, since 2×2138553556² = 9146822623760490272, which contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 135241 + ... + 150223.

It is an arithmetic number, because the mean of its divisors is an integer number (165198600).

Almost surely, 2^2138553556 is an apocalyptic number.

It is an amenable number.

2138553556 is a deficient number, since it is larger than the sum of its proper divisors (1826212844).

2138553556 is a wasteful number, since it uses less digits than its factorization.

2138553556 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 17103 (or 17101 counting only the distinct ones).

The product of its digits is 540000, while the sum is 43.

The square root of 2138553556 is about 46244.4975753873. The cubic root of 2138553556 is about 1288.3683386757.

The spelling of 2138553556 in words is "two billion, one hundred thirty-eight million, five hundred fifty-three thousand, five hundred fifty-six".