7956767640 has 32 divisors (see below), whose sum is σ = 23870303280. Its totient is φ = 2121804672.

The previous prime is 7956767597. The next prime is 7956767657. The reversal of 7956767640 is 467676597.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 33153079 + ... + 33153318.

Almost surely, 2^7956767640 is an apocalyptic number.

It is an amenable number.

7956767640 is an abundant number, since it is smaller than the sum of its proper divisors (15913535640).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

7956767640 is a wasteful number, since it uses less digits than its factorization.

7956767640 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 66306411 (or 66306407 counting only the distinct ones).

The product of its (nonzero) digits is 13335840, while the sum is 57.

The square root of 7956767640 is about 89200.7154679827. The cubic root of 7956767640 is about 1996.3907940675.

The spelling of 7956767640 in words is "seven billion, nine hundred fifty-six million, seven hundred sixty-seven thousand, six hundred forty".