136478038667 has 4 divisors (see below), whose sum is σ = 136864662360. Its totient is φ = 136091414976.

The previous prime is 136478038663. The next prime is 136478038699. The reversal of 136478038667 is 766830874631.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 766830874631 = 193 ⋅3973216967.

It is a cyclic number.

It is not a de Polignac number, because 136478038667 - 2² = 136478038663 is a prime.

It is a super-2 number, since 2×136478038667² (a number of 23 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (136478038663) 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, 193311317 + ... + 193312022.

It is an arithmetic number, because the mean of its divisors is an integer number (34216165590).

Almost surely, 2^136478038667 is an apocalyptic number.

136478038667 is a deficient number, since it is larger than the sum of its proper divisors (386623693).

136478038667 is an equidigital number, since it uses as much as digits as its factorization.

136478038667 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 386623692.

The product of its (nonzero) digits is 24385536, while the sum is 59.

The spelling of 136478038667 in words is "one hundred thirty-six billion, four hundred seventy-eight million, thirty-eight thousand, six hundred sixty-seven".