137343763581 has 4 divisors (see below), whose sum is σ = 183125018112. Its totient is φ = 91562509052.

The previous prime is 137343763561. The next prime is 137343763591. The reversal of 137343763581 is 185367343731.

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 137343763581 - 2¹⁰ = 137343762557 is a prime.

It is a super-2 number, since 2×137343763581² (a number of 23 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (137343763561) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 22890627261 + ... + 22890627266.

It is an arithmetic number, because the mean of its divisors is an integer number (45781254528).

Almost surely, 2^137343763581 is an apocalyptic number.

It is an amenable number.

137343763581 is a deficient number, since it is larger than the sum of its proper divisors (45781254531).

137343763581 is an equidigital number, since it uses as much as digits as its factorization.

137343763581 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 45781254530.

The product of its digits is 3810240, while the sum is 51.

The spelling of 137343763581 in words is "one hundred thirty-seven billion, three hundred forty-three million, seven hundred sixty-three thousand, five hundred eighty-one".