78618797040 has 480 divisors, whose sum is σ = 297770941440. Its totient is φ = 16805265408.

The previous prime is 78618797039. The next prime is 78618797053. The reversal of 78618797040 is 4079781687.

It is a happy number.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 95 ways as a sum of consecutive naturals, for example, 93704941 + ... + 93705779.

It is an arithmetic number, because the mean of its divisors is an integer number (620356128).

Almost surely, 2^78618797040 is an apocalyptic number.

78618797040 is a gapful number since it is divisible by the number (70) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 78618797040, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (148885470720).

78618797040 is an abundant number, since it is smaller than the sum of its proper divisors (219152144400).

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

78618797040 is a wasteful number, since it uses less digits than its factorization.

78618797040 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1089 (or 1066 counting only the distinct ones).

The product of its (nonzero) digits is 4741632, while the sum is 57.

The spelling of 78618797040 in words is "seventy-eight billion, six hundred eighteen million, seven hundred ninety-seven thousand, forty".