7780423956 has 96 divisors (see below), whose sum is σ = 19198384128. Its totient is φ = 2449749120.

The previous prime is 7780423907. The next prime is 7780423961. The reversal of 7780423956 is 6593240877.

It is a junction number, because it is equal to n+sod(n) for n = 7780423899 and 7780423908.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 1939705 + ... + 1943711.

It is an arithmetic number, because the mean of its divisors is an integer number (199983168).

Almost surely, 2^7780423956 is an apocalyptic number.

It is an amenable number.

7780423956 is an abundant number, since it is smaller than the sum of its proper divisors (11417960172).

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

7780423956 is a wasteful number, since it uses less digits than its factorization.

7780423956 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4181 (or 4179 counting only the distinct ones).

The product of its (nonzero) digits is 2540160, while the sum is 51.

The square root of 7780423956 is about 88206.7115133537. The cubic root of 7780423956 is about 1981.5319874936.

The spelling of 7780423956 in words is "seven billion, seven hundred eighty million, four hundred twenty-three thousand, nine hundred fifty-six".