2451444540 has 48 divisors (see below), whose sum is σ = 7267815072. Its totient is φ = 615264256.

The previous prime is 2451444533. The next prime is 2451444607. The reversal of 2451444540 is 454441542.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1200669 + ... + 1202708.

It is an arithmetic number, because the mean of its divisors is an integer number (151412814).

Almost surely, 2^2451444540 is an apocalyptic number.

2451444540 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

2451444540 is an abundant number, since it is smaller than the sum of its proper divisors (4816370532).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

2451444540 is a wasteful number, since it uses less digits than its factorization.

2451444540 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2403406 (or 2403404 counting only the distinct ones).

The product of its (nonzero) digits is 51200, while the sum is 33.

The square root of 2451444540 is about 49512.0645903602. The cubic root of 2451444540 is about 1348.3646480385.

The spelling of 2451444540 in words is "two billion, four hundred fifty-one million, four hundred forty-four thousand, five hundred forty".