2456680639 has 16 divisors (see below), whose sum is σ = 2956780800. Its totient is φ = 1993970304.

The previous prime is 2456680637. The next prime is 2456680657. The reversal of 2456680639 is 9360866542.

It is a cyclic number.

It is not a de Polignac number, because 2456680639 - 2¹ = 2456680637 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 2456680592 and 2456680601.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2456680631) 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, 564279 + ... + 568615.

It is an arithmetic number, because the mean of its divisors is an integer number (184798800).

Almost surely, 2^2456680639 is an apocalyptic number.

2456680639 is a deficient number, since it is larger than the sum of its proper divisors (500100161).

2456680639 is a wasteful number, since it uses less digits than its factorization.

2456680639 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8622.

The product of its (nonzero) digits is 1866240, while the sum is 49.

The square root of 2456680639 is about 49564.9133863865. The cubic root of 2456680639 is about 1349.3239667808.

The spelling of 2456680639 in words is "two billion, four hundred fifty-six million, six hundred eighty thousand, six hundred thirty-nine".