2540252561650 has 48 divisors (see below), whose sum is σ = 4989700263744. Its totient is φ = 960212770880.

The previous prime is 2540252561629. The next prime is 2540252561659. The reversal of 2540252561650 is 561652520452.

It is a junction number, because it is equal to n+sod(n) for n = 2540252561597 and 2540252561606.

It is not an unprimeable number, because it can be changed into a prime (2540252561659) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 13211269 + ... + 13402168.

It is an arithmetic number, because the mean of its divisors is an integer number (103952088828).

Almost surely, 2^{2540252561650} is an apocalyptic number.

2540252561650 is a deficient number, since it is larger than the sum of its proper divisors (2449447702094).

2540252561650 is a wasteful number, since it uses less digits than its factorization.

2540252561650 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 26613555 (or 26613550 counting only the distinct ones).

The product of its (nonzero) digits is 720000, while the sum is 43.

The spelling of 2540252561650 in words is "two trillion, five hundred forty billion, two hundred fifty-two million, five hundred sixty-one thousand, six hundred fifty".