2540990807 has 4 divisors (see below), whose sum is σ = 2582646456. Its totient is φ = 2499335160.

The previous prime is 2540990791. The next prime is 2540990831. The reversal of 2540990807 is 7080990452.

It is a happy number.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 2540990807 - 2⁴ = 2540990791 is a prime.

It is a super-2 number, since 2×2540990807² = 12913268562517022498, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2540990107) 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, 20827733 + ... + 20827854.

It is an arithmetic number, because the mean of its divisors is an integer number (645661614).

Almost surely, 2^2540990807 is an apocalyptic number.

2540990807 is a deficient number, since it is larger than the sum of its proper divisors (41655649).

2540990807 is an equidigital number, since it uses as much as digits as its factorization.

2540990807 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 41655648.

The product of its (nonzero) digits is 181440, while the sum is 44.

The square root of 2540990807 is about 50408.2414591106. The cubic root of 2540990807 is about 1364.5863769328.

The spelling of 2540990807 in words is "two billion, five hundred forty million, nine hundred ninety thousand, eight hundred seven".