2540651257544 has 8 divisors (see below), whose sum is σ = 4763721107910. Its totient is φ = 1270325628768.

The previous prime is 2540651257517. The next prime is 2540651257597. The reversal of 2540651257544 is 4457521560452.

It can be written as a sum of positive squares in only one way, i.e., 2508226052644 + 32425204900 = 1583738^2 + 180070^2 .

It is a tau number, because it is divible by the number of its divisors (8).

It is a junction number, because it is equal to n+sod(n) for n = 2540651257492 and 2540651257501.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 158790703589 + ... + 158790703604.

Almost surely, 2^{2540651257544} is an apocalyptic number.

It is an amenable number.

2540651257544 is a deficient number, since it is larger than the sum of its proper divisors (2223069850366).

2540651257544 is a wasteful number, since it uses less digits than its factorization.

2540651257544 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 317581407199 (or 317581407195 counting only the distinct ones).

The product of its (nonzero) digits is 6720000, while the sum is 50.

The spelling of 2540651257544 in words is "two trillion, five hundred forty billion, six hundred fifty-one million, two hundred fifty-seven thousand, five hundred forty-four".