2541331661 has 12 divisors (see below), whose sum is σ = 2811883872. Its totient is φ = 2294985000.

The previous prime is 2541331657. The next prime is 2541331673. The reversal of 2541331661 is 1661331452.

It is not a de Polignac number, because 2541331661 - 2² = 2541331657 is a prime.

It is a super-2 number, since 2×2541331661² = 12916733222402037842, which contains 22 as substring.

It is a hoax number, since the sum of its digits (32) coincides with the sum of the digits of its distinct prime factors.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2541331601) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 51275 + ... + 87816.

It is an arithmetic number, because the mean of its divisors is an integer number (234323656).

Almost surely, 2^2541331661 is an apocalyptic number.

It is an amenable number.

2541331661 is a deficient number, since it is larger than the sum of its proper divisors (270552211).

2541331661 is a wasteful number, since it uses less digits than its factorization.

2541331661 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 139264 (or 139253 counting only the distinct ones).

The product of its digits is 12960, while the sum is 32.

The square root of 2541331661 is about 50411.6222809780. The cubic root of 2541331661 is about 1364.6473903935.

The spelling of 2541331661 in words is "two billion, five hundred forty-one million, three hundred thirty-one thousand, six hundred sixty-one".