137442819991 has 8 divisors (see below), whose sum is σ = 139506232320. Its totient is φ = 135379761528.

The previous prime is 137442819947. The next prime is 137442820049. The reversal of 137442819991 is 199918244731.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 137442819991 - 2²⁵ = 137409265559 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (137442819931) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 753900 + ... + 918286.

It is an arithmetic number, because the mean of its divisors is an integer number (17438279040).

Almost surely, 2^137442819991 is an apocalyptic number.

137442819991 is a deficient number, since it is larger than the sum of its proper divisors (2063412329).

137442819991 is a wasteful number, since it uses less digits than its factorization.

137442819991 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 176933.

The product of its digits is 3919104, while the sum is 58.

The spelling of 137442819991 in words is "one hundred thirty-seven billion, four hundred forty-two million, eight hundred nineteen thousand, nine hundred ninety-one".