78916091904 has 456 divisors, whose sum is σ = 256489588992. Its totient is φ = 23215472640.

The previous prime is 78916091831. The next prime is 78916091911. The reversal of 78916091904 is 40919061987.

It is a super-2 number, since 2×78916091904² (a number of 23 digits) contains 22 as substring.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 950796247 + ... + 950796329.

Almost surely, 2^78916091904 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 78916091904, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (128244794496).

78916091904 is an abundant number, since it is smaller than the sum of its proper divisors (177573497088).

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

78916091904 is an equidigital number, since it uses as much as digits as its factorization.

78916091904 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 169 (or 132 counting only the distinct ones).

The product of its (nonzero) digits is 979776, while the sum is 54.

The spelling of 78916091904 in words is "seventy-eight billion, nine hundred sixteen million, ninety-one thousand, nine hundred four".