149437121813 has 4 divisors (see below), whose sum is σ = 170785282080. Its totient is φ = 128088961548.

The previous prime is 149437121791. The next prime is 149437121851. The reversal of 149437121813 is 318121734941.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 149437121813 - 2⁸ = 149437121557 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (149437121893) 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, 10674080123 + ... + 10674080136.

It is an arithmetic number, because the mean of its divisors is an integer number (42696320520).

Almost surely, 2^149437121813 is an apocalyptic number.

It is an amenable number.

149437121813 is a deficient number, since it is larger than the sum of its proper divisors (21348160267).

149437121813 is an equidigital number, since it uses as much as digits as its factorization.

149437121813 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 21348160266.

The product of its digits is 145152, while the sum is 44.

The spelling of 149437121813 in words is "one hundred forty-nine billion, four hundred thirty-seven million, one hundred twenty-one thousand, eight hundred thirteen".