79757577020 has 96 divisors (see below), whose sum is σ = 191274531840. Its totient is φ = 27652584960.

The previous prime is 79757577019. The next prime is 79757577049. The reversal of 79757577020 is 2077575797.

It is a super-2 number, since 2×79757577020² (a number of 23 digits) contains 22 as substring.

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 31 ways as a sum of consecutive naturals, for example, 1558601 + ... + 1608959.

It is an arithmetic number, because the mean of its divisors is an integer number (1992443040).

Almost surely, 2^79757577020 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 79757577020, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (95637265920).

79757577020 is an abundant number, since it is smaller than the sum of its proper divisors (111516954820).

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

79757577020 is a wasteful number, since it uses less digits than its factorization.

79757577020 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 50715 (or 50713 counting only the distinct ones).

The product of its (nonzero) digits is 7563150, while the sum is 56.

The spelling of 79757577020 in words is "seventy-nine billion, seven hundred fifty-seven million, five hundred seventy-seven thousand, twenty".