78047723670 has 384 divisors, whose sum is σ = 238513766400. Its totient is φ = 15964210944.

The previous prime is 78047723641. The next prime is 78047723681. The reversal of 78047723670 is 7632774087.

It is a congruent number.

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, 217402951 + ... + 217403309.

It is an arithmetic number, because the mean of its divisors is an integer number (621129600).

Almost surely, 2^78047723670 is an apocalyptic number.

78047723670 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 78047723670, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (119256883200).

78047723670 is an abundant number, since it is smaller than the sum of its proper divisors (160466042730).

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

78047723670 is a wasteful number, since it uses less digits than its factorization.

78047723670 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 544 (or 521 counting only the distinct ones).

The product of its (nonzero) digits is 2765952, while the sum is 51.

The spelling of 78047723670 in words is "seventy-eight billion, forty-seven million, seven hundred twenty-three thousand, six hundred seventy".