80947198100 has 36 divisors (see below), whose sum is σ = 175710058524. Its totient is φ = 32368807680.

The previous prime is 80947198061. The next prime is 80947198103. The reversal of 80947198100 is 189174908.

It can be written as a sum of positive squares in 6 ways, for example, as 12472869124 + 68474328976 = 111682^2 + 261676^2 .

It is a super-2 number, since 2×80947198100² (a number of 23 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (80947198103) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 201434 + ... + 449966.

It is an arithmetic number, because the mean of its divisors is an integer number (4880834959).

Almost surely, 2^80947198100 is an apocalyptic number.

It is an amenable number.

80947198100 is an abundant number, since it is smaller than the sum of its proper divisors (94762860424).

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

80947198100 is a wasteful number, since it uses less digits than its factorization.

80947198100 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 251804 (or 251797 counting only the distinct ones).

The product of its (nonzero) digits is 145152, while the sum is 47.

The spelling of 80947198100 in words is "eighty billion, nine hundred forty-seven million, one hundred ninety-eight thousand, one hundred".