136408411665 has 20 divisors (see below), whose sum is σ = 244524709044. Its totient is φ = 72751152672.

The previous prime is 136408411631. The next prime is 136408411697. The reversal of 136408411665 is 566114804631.

136408411665 is a `hidden beast` number, since 136 + 40 + 8 + 411 + 6 + 65 = 666.

It can be written as a sum of positive squares in 2 ways, for example, as 66960877824 + 69447533841 = 258768^2 + 263529^2 .

It is not a de Polignac number, because 136408411665 - 2⁷ = 136408411537 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 136408411665.

It is an unprimeable number.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 168405042 + ... + 168405851.

Almost surely, 2^136408411665 is an apocalyptic number.

136408411665 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

136408411665 is a deficient number, since it is larger than the sum of its proper divisors (108116297379).

136408411665 is an equidigital number, since it uses as much as digits as its factorization.

136408411665 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 336810910 (or 336810901 counting only the distinct ones).

The product of its (nonzero) digits is 414720, while the sum is 45.

The spelling of 136408411665 in words is "one hundred thirty-six billion, four hundred eight million, four hundred eleven thousand, six hundred sixty-five".