2640602250049 has 3 divisors (see below), whose sum is σ = 2640603875043. Its totient is φ = 2640600625056.

The previous prime is 2640602249963. The next prime is 2640602250101. The reversal of 2640602250049 is 9400522060462.

The square root of 2640602250049 is 1624993.

It is a perfect power (a square), and thus also a powerful number.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It can be written as a sum of positive squares in only one way, i.e., 2356547361025 + 284054889024 = 1535105^2 + 532968^2 .

It is not a de Polignac number, because 2640602250049 - 2³⁵ = 2606242511681 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 2640602249993 and 2640602250020.

It is not an unprimeable number, because it can be changed into a prime (2640602250149) by changing a digit.

It is a polite number, since it can be written in 2 ways as a sum of consecutive naturals, for example, 812497 + ... + 2437489.

It is an arithmetic number, because the mean of its divisors is an integer number (880201291681).

Almost surely, 2^{2640602250049} is an apocalyptic number.

2640602250049 is the 1624993-rd square number.

2640602250049 is the 812497-th centered octagonal number.

It is an amenable number.

2640602250049 is a deficient number, since it is larger than the sum of its proper divisors (1624994).

2640602250049 is an frugal number, since it uses more digits than its factorization.

2640602250049 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3249986 (or 1624993 counting only the distinct ones).

The product of its (nonzero) digits is 207360, while the sum is 40.

The spelling of 2640602250049 in words is "two trillion, six hundred forty billion, six hundred two million, two hundred fifty thousand, forty-nine".