7920000656 has 10 divisors (see below), whose sum is σ = 15345001302. Its totient is φ = 3960000320.

The previous prime is 7920000631. The next prime is 7920000661. The reversal of 7920000656 is 6560000297.

It can be written as a sum of positive squares in only one way, i.e., 6397440256 + 1522560400 = 79984^2 + 39020^2 .

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 247500005 + ... + 247500036.

Almost surely, 2^7920000656 is an apocalyptic number.

7920000656 is the 47570-th centered heptagonal number.

It is an amenable number.

7920000656 is a deficient number, since it is larger than the sum of its proper divisors (7425000646).

7920000656 is a wasteful number, since it uses less digits than its factorization.

7920000656 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 495000049 (or 495000043 counting only the distinct ones).

The product of its (nonzero) digits is 22680, while the sum is 35.

The square root of 7920000656 is about 88994.3855307738. The cubic root of 7920000656 is about 1993.3110418594.

The spelling of 7920000656 in words is "seven billion, nine hundred twenty million, six hundred fifty-six", and thus it is an aban number.