136863778741 has 4 divisors (see below), whose sum is σ = 136905623584. Its totient is φ = 136821933900.

The previous prime is 136863778703. The next prime is 136863778757. The reversal of 136863778741 is 147877368631.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 147877368631 = 17 ⋅8698668743.

It is a cyclic number.

It is not a de Polignac number, because 136863778741 - 2²⁵ = 136830224309 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 136863778741.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (136863778781) 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, 20917515 + ... + 20924056.

It is an arithmetic number, because the mean of its divisors is an integer number (34226405896).

Almost surely, 2^136863778741 is an apocalyptic number.

It is an amenable number.

136863778741 is a deficient number, since it is larger than the sum of its proper divisors (41844843).

136863778741 is an equidigital number, since it uses as much as digits as its factorization.

136863778741 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 41844842.

The product of its digits is 28449792, while the sum is 61.

The spelling of 136863778741 in words is "one hundred thirty-six billion, eight hundred sixty-three million, seven hundred seventy-eight thousand, seven hundred forty-one".