97919440218 has 40 divisors (see below), whose sum is σ = 228951743328. Its totient is φ = 31220689896.

The previous prime is 97919440183. The next prime is 97919440219. The reversal of 97919440218 is 81204491979.

97919440218 is a `hidden beast` number, since 97 + 91 + 9 + 440 + 21 + 8 = 666.

It is a Harshad number since it is a multiple of its sum of digits (54).

It is not an unprimeable number, because it can be changed into a prime (97919440219) by changing a digit.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 13136296 + ... + 13143747.

Almost surely, 2^97919440218 is an apocalyptic number.

97919440218 is an abundant number, since it is smaller than the sum of its proper divisors (131032303110).

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

97919440218 is a wasteful number, since it uses less digits than its factorization.

97919440218 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 26280080 (or 26280071 counting only the distinct ones).

The product of its (nonzero) digits is 1306368, while the sum is 54.

The spelling of 97919440218 in words is "ninety-seven billion, nine hundred nineteen million, four hundred forty thousand, two hundred eighteen".