7780378660356 has 48 divisors (see below), whose sum is σ = 18373496912064. Its totient is φ = 2562135720576.

The previous prime is 7780378660291. The next prime is 7780378660361. The reversal of 7780378660356 is 6530668730877.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 39619546 + ... + 39815438.

It is an arithmetic number, because the mean of its divisors is an integer number (382781185668).

Almost surely, 2^{7780378660356} is an apocalyptic number.

It is an amenable number.

7780378660356 is an abundant number, since it is smaller than the sum of its proper divisors (10593118251708).

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

7780378660356 is a wasteful number, since it uses less digits than its factorization.

7780378660356 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 235860 (or 235858 counting only the distinct ones).

The product of its (nonzero) digits is 213373440, while the sum is 66.

The spelling of 7780378660356 in words is "seven trillion, seven hundred eighty billion, three hundred seventy-eight million, six hundred sixty thousand, three hundred fifty-six".