2139266560 has 80 divisors (see below), whose sum is σ = 5226335136. Its totient is φ = 839507968.

The previous prime is 2139266531. The next prime is 2139266561. The reversal of 2139266560 is 656629312.

It is a tau number, because it is divible by the number of its divisors (80).

It is a super-2 number, since 2×2139266560² = 9152922829468467200, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (40).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2139266561) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 127797 + ... + 143563.

Almost surely, 2^2139266560 is an apocalyptic number.

2139266560 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 2139266560, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2613167568).

2139266560 is an abundant number, since it is smaller than the sum of its proper divisors (3087068576).

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

2139266560 is an equidigital number, since it uses as much as digits as its factorization.

2139266560 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15843 (or 15827 counting only the distinct ones).

The product of its (nonzero) digits is 116640, while the sum is 40.

The square root of 2139266560 is about 46252.2060014439. The cubic root of 2139266560 is about 1288.5115054913.

The spelling of 2139266560 in words is "two billion, one hundred thirty-nine million, two hundred sixty-six thousand, five hundred sixty".