7877953980 has 72 divisors (see below), whose sum is σ = 25734657312. Its totient is φ = 1939188096.

The previous prime is 7877953949. The next prime is 7877953987. The reversal of 7877953980 is 893597787.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (7877953987) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 1680984 + ... + 1685663.

It is an arithmetic number, because the mean of its divisors is an integer number (357425796).

Almost surely, 2^7877953980 is an apocalyptic number.

It is an amenable number.

7877953980 is an abundant number, since it is smaller than the sum of its proper divisors (17856703332).

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

7877953980 is a wasteful number, since it uses less digits than its factorization.

7877953980 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3366675 (or 3366670 counting only the distinct ones).

The product of its (nonzero) digits is 26671680, while the sum is 63.

The square root of 7877953980 is about 88757.8389777489. The cubic root of 7877953980 is about 1989.7773359278. Note that the first 3 decimals are identical.

The spelling of 7877953980 in words is "seven billion, eight hundred seventy-seven million, nine hundred fifty-three thousand, nine hundred eighty".