79981171002 has 48 divisors (see below), whose sum is σ = 173610395712. Its totient is φ = 26611548480.

The previous prime is 79981170931. The next prime is 79981171003. The reversal of 79981171002 is 20017118997.

It is a happy number.

It is not an unprimeable number, because it can be changed into a prime (79981171003) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 42838473 + ... + 42840339.

It is an arithmetic number, because the mean of its divisors is an integer number (3616883244).

Almost surely, 2^79981171002 is an apocalyptic number.

79981171002 is an abundant number, since it is smaller than the sum of its proper divisors (93629224710).

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

79981171002 is a wasteful number, since it uses less digits than its factorization.

79981171002 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4963 (or 4960 counting only the distinct ones).

The product of its (nonzero) digits is 63504, while the sum is 45.

Adding to 79981171002 its reverse (20017118997), we get a palindrome (99998289999).

The spelling of 79981171002 in words is "seventy-nine billion, nine hundred eighty-one million, one hundred seventy-one thousand, two".