137535440431 has 4 divisors (see below), whose sum is σ = 137616488352. Its totient is φ = 137454392512.

The previous prime is 137535440423. The next prime is 137535440437. The reversal of 137535440431 is 134044535731.

It is a happy number.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 134044535731 = 89 ⋅1506118379.

It is a cyclic number.

It is not a de Polignac number, because 137535440431 - 2³ = 137535440423 is a prime.

It is a super-2 number, since 2×137535440431² (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 (137535440437) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 40521415 + ... + 40524808.

It is an arithmetic number, because the mean of its divisors is an integer number (34404122088).

Almost surely, 2^137535440431 is an apocalyptic number.

137535440431 is a deficient number, since it is larger than the sum of its proper divisors (81047921).

137535440431 is an equidigital number, since it uses as much as digits as its factorization.

137535440431 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 81047920.

The product of its (nonzero) digits is 302400, while the sum is 40.

The spelling of 137535440431 in words is "one hundred thirty-seven billion, five hundred thirty-five million, four hundred forty thousand, four hundred thirty-one".