197918438104 has 8 divisors (see below), whose sum is σ = 371097071460. Its totient is φ = 98959219048.

The previous prime is 197918438051. The next prime is 197918438117. The reversal of 197918438104 is 401834819791.

It is a happy number.

It is a tau number, because it is divible by the number of its divisors (8).

It is a super-2 number, since 2×197918438104² (a number of 23 digits) contains 22 as substring.

It is a hoax number, since the sum of its digits (55) coincides with the sum of the digits of its distinct prime factors.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 12369902374 + ... + 12369902389.

Almost surely, 2^197918438104 is an apocalyptic number.

It is an amenable number.

197918438104 is a deficient number, since it is larger than the sum of its proper divisors (173178633356).

197918438104 is a wasteful number, since it uses less digits than its factorization.

197918438104 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 24739804769 (or 24739804765 counting only the distinct ones).

The product of its (nonzero) digits is 1741824, while the sum is 55.

The spelling of 197918438104 in words is "one hundred ninety-seven billion, nine hundred eighteen million, four hundred thirty-eight thousand, one hundred four".