137854782181 has 4 divisors (see below), whose sum is σ = 141060707392. Its totient is φ = 134648856972.

The previous prime is 137854782173. The next prime is 137854782187. The reversal of 137854782181 is 181287458731.

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 137854782181 - 2³ = 137854782173 is a prime.

It is a super-2 number, since 2×137854782181² (a number of 23 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (137854782187) 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, 1602962541 + ... + 1602962626.

It is an arithmetic number, because the mean of its divisors is an integer number (35265176848).

Almost surely, 2^137854782181 is an apocalyptic number.

It is an amenable number.

137854782181 is a deficient number, since it is larger than the sum of its proper divisors (3205925211).

137854782181 is an equidigital number, since it uses as much as digits as its factorization.

137854782181 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3205925210.

The product of its digits is 3010560, while the sum is 55.

The spelling of 137854782181 in words is "one hundred thirty-seven billion, eight hundred fifty-four million, seven hundred eighty-two thousand, one hundred eighty-one".