7961507880 has 32 divisors (see below), whose sum is σ = 23884524000. Its totient is φ = 2123068736.

The previous prime is 7961507863. The next prime is 7961507887. The reversal of 7961507880 is 887051697.

It is not an unprimeable number, because it can be changed into a prime (7961507887) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 33172830 + ... + 33173069.

It is an arithmetic number, because the mean of its divisors is an integer number (746391375).

Almost surely, 2^7961507880 is an apocalyptic number.

It is an amenable number.

7961507880 is an abundant number, since it is smaller than the sum of its proper divisors (15923016120).

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

7961507880 is a wasteful number, since it uses less digits than its factorization.

7961507880 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 66345913 (or 66345909 counting only the distinct ones).

The product of its (nonzero) digits is 846720, while the sum is 51.

The square root of 7961507880 is about 89227.2821506965. The cubic root of 7961507880 is about 1996.7871649424.

The spelling of 7961507880 in words is "seven billion, nine hundred sixty-one million, five hundred seven thousand, eight hundred eighty".