2139555560 has 32 divisors (see below), whose sum is σ = 4856612040. Its totient is φ = 848246784.

The previous prime is 2139555547. The next prime is 2139555623. The reversal of 2139555560 is 655559312.

It can be written as a sum of positive squares in 4 ways, for example, as 1812886084 + 326669476 = 42578^2 + 18074^2 .

It is a Smith number, since the sum of its digits (41) coincides with the sum of the digits of its prime factors.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 232157 + ... + 241196.

Almost surely, 2^2139555560 is an apocalyptic number.

2139555560 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

2139555560 is an abundant number, since it is smaller than the sum of its proper divisors (2717056480).

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

2139555560 is a wasteful number, since it uses less digits than its factorization.

2139555560 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 473477 (or 473473 counting only the distinct ones).

The product of its (nonzero) digits is 202500, while the sum is 41.

The square root of 2139555560 is about 46255.3300712469. The cubic root of 2139555560 is about 1288.5695258529.

The spelling of 2139555560 in words is "two billion, one hundred thirty-nine million, five hundred fifty-five thousand, five hundred sixty".