79281509680 has 80 divisors (see below), whose sum is σ = 195497290944. Its totient is φ = 29836477440.

The previous prime is 79281509663. The next prime is 79281509683. The reversal of 79281509680 is 8690518297.

It is a tau number, because it is divible by the number of its divisors (80).

It is not an unprimeable number, because it can be changed into a prime (79281509683) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 240939 + ... + 465418.

Almost surely, 2^79281509680 is an apocalyptic number.

It is an amenable number.

79281509680 is an abundant number, since it is smaller than the sum of its proper divisors (116215781264).

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

79281509680 is a wasteful number, since it uses less digits than its factorization.

79281509680 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 706454 (or 706448 counting only the distinct ones).

The product of its (nonzero) digits is 2177280, while the sum is 55.

The spelling of 79281509680 in words is "seventy-nine billion, two hundred eighty-one million, five hundred nine thousand, six hundred eighty".