149194856639 has 4 divisors (see below), whose sum is σ = 151296192720. Its totient is φ = 147093520560.

The previous prime is 149194856633. The next prime is 149194856693. The reversal of 149194856639 is 936658491941.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 936658491941 = 47563 ⋅19693007.

It is a cyclic number.

It is not a de Polignac number, because 149194856639 - 2²⁰ = 149193808063 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 (149194856633) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1050667934 + ... + 1050668075.

It is an arithmetic number, because the mean of its divisors is an integer number (37824048180).

Almost surely, 2^149194856639 is an apocalyptic number.

149194856639 is a deficient number, since it is larger than the sum of its proper divisors (2101336081).

149194856639 is an equidigital number, since it uses as much as digits as its factorization.

149194856639 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2101336080.

The product of its digits is 50388480, while the sum is 65.

The spelling of 149194856639 in words is "one hundred forty-nine billion, one hundred ninety-four million, eight hundred fifty-six thousand, six hundred thirty-nine".