2640561262616 has 16 divisors (see below), whose sum is σ = 4951140941040. Its totient is φ = 1320257011680.

The previous prime is 2640561262613. The next prime is 2640561262627. The reversal of 2640561262616 is 6162621650462.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2640561262613) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2472740 + ... + 3375731.

It is an arithmetic number, because the mean of its divisors is an integer number (309446308815).

Almost surely, 2^{2640561262616} is an apocalyptic number.

It is an amenable number.

2640561262616 is a deficient number, since it is larger than the sum of its proper divisors (2310579678424).

2640561262616 is a wasteful number, since it uses less digits than its factorization.

2640561262616 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5904914 (or 5904910 counting only the distinct ones).

The product of its (nonzero) digits is 1244160, while the sum is 47.

The spelling of 2640561262616 in words is "two trillion, six hundred forty billion, five hundred sixty-one million, two hundred sixty-two thousand, six hundred sixteen".