2579297038649 has 16 divisors (see below), whose sum is σ = 2678832414720. Its totient is φ = 2480786780880.

The previous prime is 2579297038631. The next prime is 2579297038663. The reversal of 2579297038649 is 9468307929752.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-2579297038649 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (2579297038609) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 39846092 + ... + 39910770.

It is an arithmetic number, because the mean of its divisors is an integer number (167427025920).

Almost surely, 2^{2579297038649} is an apocalyptic number.

It is an amenable number.

2579297038649 is a deficient number, since it is larger than the sum of its proper divisors (99535376071).

2579297038649 is a wasteful number, since it uses less digits than its factorization.

2579297038649 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 72580.

The product of its (nonzero) digits is 411505920, while the sum is 71.

The spelling of 2579297038649 in words is "two trillion, five hundred seventy-nine billion, two hundred ninety-seven million, thirty-eight thousand, six hundred forty-nine".