2371520661 has 16 divisors (see below), whose sum is σ = 3258112704. Its totient is φ = 1533250944.

The previous prime is 2371520609. The next prime is 2371520687. The reversal of 2371520661 is 1660251732.

It is not a de Polignac number, because 2371520661 - 2¹¹ = 2371518613 is a prime.

It is a super-2 number, since 2×2371520661² = 11248220491099753842, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2371520161) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 720 + ... + 68873.

It is an arithmetic number, because the mean of its divisors is an integer number (203632044).

Almost surely, 2^2371520661 is an apocalyptic number.

It is an amenable number.

2371520661 is a deficient number, since it is larger than the sum of its proper divisors (886592043).

2371520661 is a wasteful number, since it uses less digits than its factorization.

2371520661 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 69940.

The product of its (nonzero) digits is 15120, while the sum is 33.

The square root of 2371520661 is about 48698.2613755358. The cubic root of 2371520661 is about 1333.5489779476.

The spelling of 2371520661 in words is "two billion, three hundred seventy-one million, five hundred twenty thousand, six hundred sixty-one".