7974890649 has 12 divisors (see below), whose sum is σ = 12566494512. Its totient is φ = 4833267000.

The previous prime is 7974890633. The next prime is 7974890681. The reversal of 7974890649 is 9460984797.

7974890649 is a `hidden beast` number, since 7 + 97 + 489 + 0 + 64 + 9 = 666.

It is not a de Polignac number, because 7974890649 - 2⁴ = 7974890633 is a prime.

It is not an unprimeable number, because it can be changed into a prime (7974190649) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 40277127 + ... + 40277324.

It is an arithmetic number, because the mean of its divisors is an integer number (1047207876).

Almost surely, 2^7974890649 is an apocalyptic number.

It is an amenable number.

7974890649 is a deficient number, since it is larger than the sum of its proper divisors (4591603863).

7974890649 is a wasteful number, since it uses less digits than its factorization.

7974890649 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 80554468 (or 80554465 counting only the distinct ones).

The product of its (nonzero) digits is 27433728, while the sum is 63.

The square root of 7974890649 is about 89302.2432473003. The cubic root of 7974890649 is about 1997.9053610931.

The spelling of 7974890649 in words is "seven billion, nine hundred seventy-four million, eight hundred ninety thousand, six hundred forty-nine".