79707740379840 has 168 divisors, whose sum is σ = 274183032786000. Its totient is φ = 21253721462784.

The previous prime is 79707740379791. The next prime is 79707740379847. The reversal of 79707740379840 is 4897304770797.

79707740379840 is a `hidden beast` number, since 7 + 9 + 7 + 0 + 77 + 403 + 79 + 84 + 0 = 666.

It is a hoax number, since the sum of its digits (72) coincides with the sum of the digits of its distinct prime factors.

It is a Harshad number since it is a multiple of its sum of digits (72).

It is not an unprimeable number, because it can be changed into a prime (79707740379847) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 35655411 + ... + 37824909.

Almost surely, 2^{79707740379840} is an apocalyptic number.

It is an amenable number.

79707740379840 is an abundant number, since it is smaller than the sum of its proper divisors (194475292406160).

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

79707740379840 is a wasteful number, since it uses less digits than its factorization.

79707740379840 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2182279 (or 2182266 counting only the distinct ones).

The product of its (nonzero) digits is 522764928, while the sum is 72.

The spelling of 79707740379840 in words is "seventy-nine trillion, seven hundred seven billion, seven hundred forty million, three hundred seventy-nine thousand, eight hundred forty".