79427637240 has 256 divisors, whose sum is σ = 287127936000. Its totient is φ = 17171066880.

The previous prime is 79427637203. The next prime is 79427637271. The reversal of 79427637240 is 4273672497.

It is a happy number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 10545796 + ... + 10553324.

It is an arithmetic number, because the mean of its divisors is an integer number (1121593500).

Almost surely, 2^79427637240 is an apocalyptic number.

79427637240 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 79427637240, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (143563968000).

79427637240 is an abundant number, since it is smaller than the sum of its proper divisors (207700298760).

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

79427637240 is a wasteful number, since it uses less digits than its factorization.

79427637240 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8230 (or 8226 counting only the distinct ones).

The product of its (nonzero) digits is 3556224, while the sum is 51.

The spelling of 79427637240 in words is "seventy-nine billion, four hundred twenty-seven million, six hundred thirty-seven thousand, two hundred forty".