136784837077 has 4 divisors (see below), whose sum is σ = 156325528096. Its totient is φ = 117244146060.

The previous prime is 136784837039. The next prime is 136784837087. The reversal of 136784837077 is 770738487631.

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: 770738487631 = 7 ⋅110105498233.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-136784837077 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (136784837087) 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, 9770345499 + ... + 9770345512.

It is an arithmetic number, because the mean of its divisors is an integer number (39081382024).

Almost surely, 2^136784837077 is an apocalyptic number.

It is an amenable number.

136784837077 is a deficient number, since it is larger than the sum of its proper divisors (19540691019).

136784837077 is an equidigital number, since it uses as much as digits as its factorization.

136784837077 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 19540691018.

The product of its (nonzero) digits is 33191424, while the sum is 61.

The spelling of 136784837077 in words is "one hundred thirty-six billion, seven hundred eighty-four million, eight hundred thirty-seven thousand, seventy-seven".