135840437457 has 16 divisors (see below), whose sum is σ = 183069980352. Its totient is φ = 89586432000.

The previous prime is 135840437429. The next prime is 135840437459. The reversal of 135840437457 is 754734048531.

It is not a de Polignac number, because 135840437457 - 2¹² = 135840433361 is a prime.

It is not an unprimeable number, because it can be changed into a prime (135840437459) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 551353 + ... + 758729.

It is an arithmetic number, because the mean of its divisors is an integer number (11441873772).

Almost surely, 2^135840437457 is an apocalyptic number.

It is an amenable number.

135840437457 is a deficient number, since it is larger than the sum of its proper divisors (47229542895).

135840437457 is a wasteful number, since it uses less digits than its factorization.

135840437457 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 209728.

The product of its (nonzero) digits is 5644800, while the sum is 51.

The spelling of 135840437457 in words is "one hundred thirty-five billion, eight hundred forty million, four hundred thirty-seven thousand, four hundred fifty-seven".