136438965 has 32 divisors (see below), whose sum is σ = 261219840. Its totient is φ = 67169088.

The previous prime is 136438961. The next prime is 136438999. The reversal of 136438965 is 569834631.

It is not a de Polignac number, because 136438965 - 2² = 136438961 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is a self number, because there is not a number n which added to its sum of digits gives 136438965.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (136438961) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 37117 + ... + 40626.

It is an arithmetic number, because the mean of its divisors is an integer number (8163120).

Almost surely, 2^136438965 is an apocalyptic number.

136438965 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

136438965 is a deficient number, since it is larger than the sum of its proper divisors (124780875).

136438965 is a wasteful number, since it uses less digits than its factorization.

136438965 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 77770 (or 77764 counting only the distinct ones).

The product of its digits is 466560, while the sum is 45.

The square root of 136438965 is about 11680.7090966259. The cubic root of 136438965 is about 514.8090095195.

The spelling of 136438965 in words is "one hundred thirty-six million, four hundred thirty-eight thousand, nine hundred sixty-five".