134640452431 has 4 divisors (see below), whose sum is σ = 138983692864. Its totient is φ = 130297212000.

The previous prime is 134640452411. The next prime is 134640452449. The reversal of 134640452431 is 134254046431.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 134254046431 = 47 ⋅2856469073.

It is a cyclic number.

It is not a de Polignac number, because 134640452431 - 2¹⁷ = 134640321359 is a prime.

It is a super-2 number, since 2×134640452431² (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 (134640452411) 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, 2171620170 + ... + 2171620231.

It is an arithmetic number, because the mean of its divisors is an integer number (34745923216).

Almost surely, 2^134640452431 is an apocalyptic number.

134640452431 is a deficient number, since it is larger than the sum of its proper divisors (4343240433).

134640452431 is an equidigital number, since it uses as much as digits as its factorization.

134640452431 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4343240432.

The product of its (nonzero) digits is 138240, while the sum is 37.

Adding to 134640452431 its reverse (134254046431), we get a palindrome (268894498862).

The spelling of 134640452431 in words is "one hundred thirty-four billion, six hundred forty million, four hundred fifty-two thousand, four hundred thirty-one".