2591490621 has 8 divisors (see below), whose sum is σ = 3456142144. Its totient is φ = 1727249760.

The previous prime is 2591490613. The next prime is 2591490631. The reversal of 2591490621 is 1260941952.

2591490621 is digitally balanced in base 2 and base 4, because in such bases it contains all the possibile digits an equal number of times.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 2591490621 - 2³ = 2591490613 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 2591490621.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2591490631) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 87625 + ... + 113406.

It is an arithmetic number, because the mean of its divisors is an integer number (432017768).

Almost surely, 2^2591490621 is an apocalyptic number.

It is an amenable number.

2591490621 is a deficient number, since it is larger than the sum of its proper divisors (864651523).

2591490621 is a wasteful number, since it uses less digits than its factorization.

2591490621 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 205331.

The product of its (nonzero) digits is 38880, while the sum is 39.

The square root of 2591490621 is about 50906.6854253938. The cubic root of 2591490621 is about 1373.5671016201.

The spelling of 2591490621 in words is "two billion, five hundred ninety-one million, four hundred ninety thousand, six hundred twenty-one".