2155793740 has 24 divisors (see below), whose sum is σ = 4529448000. Its totient is φ = 861883008.

The previous prime is 2155793729. The next prime is 2155793779. The reversal of 2155793740 is 473975512.

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, 15136 + ... + 67384.

It is an arithmetic number, because the mean of its divisors is an integer number (188727000).

Almost surely, 2^2155793740 is an apocalyptic number.

2155793740 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

2155793740 is an abundant number, since it is smaller than the sum of its proper divisors (2373654260).

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

2155793740 is a wasteful number, since it uses less digits than its factorization.

2155793740 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 54321 (or 54319 counting only the distinct ones).

The product of its (nonzero) digits is 264600, while the sum is 43.

The square root of 2155793740 is about 46430.5259500687. The cubic root of 2155793740 is about 1291.8211842805.

The spelling of 2155793740 in words is "two billion, one hundred fifty-five million, seven hundred ninety-three thousand, seven hundred forty".