79781445572 has 12 divisors (see below), whose sum is σ = 141583974336. Its totient is φ = 39328881480.

The previous prime is 79781445551. The next prime is 79781445577. The reversal of 79781445572 is 27554418797.

It is a happy number.

It is not an unprimeable number, because it can be changed into a prime (79781445577) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 140460008 + ... + 140460575.

It is an arithmetic number, because the mean of its divisors is an integer number (11798664528).

Almost surely, 2^79781445572 is an apocalyptic number.

It is an amenable number.

79781445572 is a deficient number, since it is larger than the sum of its proper divisors (61802528764).

79781445572 is a wasteful number, since it uses less digits than its factorization.

79781445572 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 280920658 (or 280920656 counting only the distinct ones).

The product of its digits is 19756800, while the sum is 59.

The spelling of 79781445572 in words is "seventy-nine billion, seven hundred eighty-one million, four hundred forty-five thousand, five hundred seventy-two".