78780806370 has 384 divisors, whose sum is σ = 257060044800. Its totient is φ = 16332212736.

The previous prime is 78780806347. The next prime is 78780806381. The reversal of 78780806370 is 7360808787.

It is an unprimeable number.

It is a polite number, since it can be written in 191 ways as a sum of consecutive naturals, for example, 44084617 + ... + 44086403.

It is an arithmetic number, because the mean of its divisors is an integer number (669427200).

Almost surely, 2^78780806370 is an apocalyptic number.

78780806370 is a gapful number since it is divisible by the number (70) formed by its first and last digit.

It is a practical number, because each smaller number is the sum of distinct divisors of 78780806370, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (128530022400).

78780806370 is an abundant number, since it is smaller than the sum of its proper divisors (178279238430).

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

78780806370 is a wasteful number, since it uses less digits than its factorization.

78780806370 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1982 (or 1979 counting only the distinct ones).

The product of its (nonzero) digits is 3161088, while the sum is 54.

The spelling of 78780806370 in words is "seventy-eight billion, seven hundred eighty million, eight hundred six thousand, three hundred seventy".