201291139928 has 8 divisors (see below), whose sum is σ = 377420887380. Its totient is φ = 100645569960.

The previous prime is 201291139871. The next prime is 201291139963. The reversal of 201291139928 is 829931192102.

It is a happy number.

201291139928 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

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

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, 12580696238 + ... + 12580696253.

Almost surely, 2^201291139928 is an apocalyptic number.

It is an amenable number.

201291139928 is a deficient number, since it is larger than the sum of its proper divisors (176129747452).

201291139928 is a wasteful number, since it uses less digits than its factorization.

201291139928 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 25161392497 (or 25161392493 counting only the distinct ones).

The product of its (nonzero) digits is 139968, while the sum is 47.

The spelling of 201291139928 in words is "two hundred one billion, two hundred ninety-one million, one hundred thirty-nine thousand, nine hundred twenty-eight".