78411896640 has 896 divisors, whose sum is σ = 353025699840. Its totient is φ = 15908659200.

The previous prime is 78411896639. The next prime is 78411896671. The reversal of 78411896640 is 4669811487.

It is a super-2 number, since 2×78411896640² (a number of 23 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (54).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 127 ways as a sum of consecutive naturals, for example, 28605670 + ... + 28608410.

Almost surely, 2^78411896640 is an apocalyptic number.

78411896640 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 78411896640, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (176512849920).

78411896640 is an abundant number, since it is smaller than the sum of its proper divisors (274613803200).

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

78411896640 is a wasteful number, since it uses less digits than its factorization.

78411896640 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2828 (or 2812 counting only the distinct ones).

The product of its (nonzero) digits is 2322432, while the sum is 54.

The spelling of 78411896640 in words is "seventy-eight billion, four hundred eleven million, eight hundred ninety-six thousand, six hundred forty".