2540624391 has 12 divisors (see below), whose sum is σ = 3671112432. Its totient is φ = 1693139616.

The previous prime is 2540624353. The next prime is 2540624407. The reversal of 2540624391 is 1934260452.

It is a happy number.

2540624391 is a `hidden beast` number, since 2 + 5 + 406 + 243 + 9 + 1 = 666.

It is not a de Polignac number, because 2540624391 - 2²⁵ = 2507069959 is a prime.

It is a super-2 number, since 2×2540624391² = 12909544592288241762, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2540623391) 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, 23691 + ... + 75116.

It is an arithmetic number, because the mean of its divisors is an integer number (305926036).

Almost surely, 2^2540624391 is an apocalyptic number.

2540624391 is a deficient number, since it is larger than the sum of its proper divisors (1130488041).

2540624391 is a wasteful number, since it uses less digits than its factorization.

2540624391 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 101670 (or 101667 counting only the distinct ones).

The product of its (nonzero) digits is 51840, while the sum is 36.

The square root of 2540624391 is about 50404.6068430258. The cubic root of 2540624391 is about 1364.5207817436.

The spelling of 2540624391 in words is "two billion, five hundred forty million, six hundred twenty-four thousand, three hundred ninety-one".