135856626658531 has 4 divisors (see below), whose sum is σ = 137201741774064. Its totient is φ = 134511511543000.

The previous prime is 135856626658507. The next prime is 135856626658553.

135856626658531 is nontrivially palindromic in base 10.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 135856626658531 - 2⁵ = 135856626658499 is a prime.

It is a super-2 number, since 2×135856626658531² (a number of 29 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (135856626659531) 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, 672557557615 + ... + 672557557816.

It is an arithmetic number, because the mean of its divisors is an integer number (34300435443516).

Almost surely, 2^{135856626658531} is an apocalyptic number.

135856626658531 is a deficient number, since it is larger than the sum of its proper divisors (1345115115533).

135856626658531 is a wasteful number, since it uses less digits than its factorization.

135856626658531 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1345115115532.

The product of its digits is 933120000, while the sum is 70.

The spelling of 135856626658531 in words is "one hundred thirty-five trillion, eight hundred fifty-six billion, six hundred twenty-six million, six hundred fifty-eight thousand, five hundred thirty-one".