2109901761 has 24 divisors (see below), whose sum is σ = 3354133536. Its totient is φ = 1267405440.

The previous prime is 2109901747. The next prime is 2109901763. The reversal of 2109901761 is 1671099012.

It is not a de Polignac number, because 2109901761 - 2¹¹ = 2109899713 is a prime.

It is a super-2 number, since 2×2109901761² = 8903370882141802242, which contains 22 as substring.

It is a hoax number, since the sum of its digits (36) coincides with the sum of the digits of its distinct prime factors.

It is not an unprimeable number, because it can be changed into a prime (2109901763) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 83115 + ... + 105488.

It is an arithmetic number, because the mean of its divisors is an integer number (139755564).

Almost surely, 2^2109901761 is an apocalyptic number.

It is an amenable number.

2109901761 is a deficient number, since it is larger than the sum of its proper divisors (1244231775).

2109901761 is a wasteful number, since it uses less digits than its factorization.

2109901761 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 188733 (or 188730 counting only the distinct ones).

The product of its (nonzero) digits is 6804, while the sum is 36.

The square root of 2109901761 is about 45933.6669666161. Note that the first 3 decimals coincide. The cubic root of 2109901761 is about 1282.5887065166.

The spelling of 2109901761 in words is "two billion, one hundred nine million, nine hundred one thousand, seven hundred sixty-one".