79969045840 has 160 divisors (see below), whose sum is σ = 205672836096. Its totient is φ = 28782551040.

The previous prime is 79969045817. The next prime is 79969045861. The reversal of 79969045840 is 4854096997.

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, 3487854 + ... + 3510706.

Almost surely, 2^79969045840 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 79969045840, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (102836418048).

79969045840 is an abundant number, since it is smaller than the sum of its proper divisors (125703790256).

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

79969045840 is a wasteful number, since it uses less digits than its factorization.

79969045840 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 22997 (or 22991 counting only the distinct ones).

The product of its (nonzero) digits is 19595520, while the sum is 61.

The spelling of 79969045840 in words is "seventy-nine billion, nine hundred sixty-nine million, forty-five thousand, eight hundred forty".