197918438152 has 8 divisors (see below), whose sum is σ = 371097071550. Its totient is φ = 98959219072.

The previous prime is 197918438143. The next prime is 197918438171. The reversal of 197918438152 is 251834819791.

It can be written as a sum of positive squares in only one way, i.e., 194592147876 + 3326290276 = 441126^2 + 57674^2 .

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

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 12369902377 + ... + 12369902392.

Almost surely, 2^197918438152 is an apocalyptic number.

It is an amenable number.

197918438152 is a deficient number, since it is larger than the sum of its proper divisors (173178633398).

197918438152 is a wasteful number, since it uses less digits than its factorization.

197918438152 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 24739804775 (or 24739804771 counting only the distinct ones).

The product of its digits is 4354560, while the sum is 58.

The spelling of 197918438152 in words is "one hundred ninety-seven billion, nine hundred eighteen million, four hundred thirty-eight thousand, one hundred fifty-two".