2540501644 has 12 divisors (see below), whose sum is σ = 4446981000. Its totient is φ = 1269935648.

The previous prime is 2540501633. The next prime is 2540501651. The reversal of 2540501644 is 4461050452.

It is a happy number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 60169 + ... + 93280.

It is an arithmetic number, because the mean of its divisors is an integer number (370581750).

Almost surely, 2^2540501644 is an apocalyptic number.

It is an amenable number.

2540501644 is a deficient number, since it is larger than the sum of its proper divisors (1906479356).

2540501644 is a wasteful number, since it uses less digits than its factorization.

2540501644 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 157592 (or 157590 counting only the distinct ones).

The product of its (nonzero) digits is 19200, while the sum is 31.

The square root of 2540501644 is about 50403.3892114409. The cubic root of 2540501644 is about 1364.4988063675.

The spelling of 2540501644 in words is "two billion, five hundred forty million, five hundred one thousand, six hundred forty-four".