2650137621 has 4 divisors (see below), whose sum is σ = 3533516832. Its totient is φ = 1766758412.

The previous prime is 2650137593. The next prime is 2650137643. The reversal of 2650137621 is 1267310562.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 2650137621 - 2⁷ = 2650137493 is a prime.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2650139621) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 441689601 + ... + 441689606.

It is an arithmetic number, because the mean of its divisors is an integer number (883379208).

Almost surely, 2^2650137621 is an apocalyptic number.

It is an amenable number.

2650137621 is a deficient number, since it is larger than the sum of its proper divisors (883379211).

2650137621 is an equidigital number, since it uses as much as digits as its factorization.

2650137621 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 883379210.

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

The square root of 2650137621 is about 51479.4873808976. The cubic root of 2650137621 is about 1383.8514584153.

The spelling of 2650137621 in words is "two billion, six hundred fifty million, one hundred thirty-seven thousand, six hundred twenty-one".