79905343488 has 192 divisors, whose sum is σ = 221306904000. Its totient is φ = 25607995392.

The previous prime is 79905343439. The next prime is 79905343501. The reversal of 79905343488 is 88434350997.

It is a tau number, because it is divible by the number of its divisors (192).

It is a super-2 number, since 2×79905343488² (a number of 23 digits) contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 49353943 + ... + 49355561.

It is an arithmetic number, because the mean of its divisors is an integer number (1152640125).

Almost surely, 2^79905343488 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 79905343488, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (110653452000).

79905343488 is an abundant number, since it is smaller than the sum of its proper divisors (141401560512).

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

79905343488 is a wasteful number, since it uses less digits than its factorization.

79905343488 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1950 (or 1930 counting only the distinct ones).

The product of its (nonzero) digits is 26127360, while the sum is 60.

The spelling of 79905343488 in words is "seventy-nine billion, nine hundred five million, three hundred forty-three thousand, four hundred eighty-eight".