198740655672 has 32 divisors (see below), whose sum is σ = 535070996880. Its totient is φ = 61150970880.

The previous prime is 198740655667. The next prime is 198740655767. The reversal of 198740655672 is 276556047891.

It is a happy number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 318494329 + ... + 318494952.

Almost surely, 2^198740655672 is an apocalyptic number.

198740655672 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

198740655672 is an abundant number, since it is smaller than the sum of its proper divisors (336330341208).

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

198740655672 is a wasteful number, since it uses less digits than its factorization.

198740655672 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 636989303 (or 636989299 counting only the distinct ones).

The product of its (nonzero) digits is 25401600, while the sum is 60.

The spelling of 198740655672 in words is "one hundred ninety-eight billion, seven hundred forty million, six hundred fifty-five thousand, six hundred seventy-two".