136723855921998 has 16 divisors (see below), whose sum is σ = 273449431035216. Its totient is φ = 45574332108800.

The previous prime is 136723855921981. The next prime is 136723855921999. The reversal of 136723855921998 is 899129558327631.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (136723855921999) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 70597953 + ... + 72508748.

It is an arithmetic number, because the mean of its divisors is an integer number (17090589439701).

Almost surely, 2^{136723855921998} is an apocalyptic number.

136723855921998 is an abundant number, since it is smaller than the sum of its proper divisors (136725575113218).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

136723855921998 is a wasteful number, since it uses less digits than its factorization.

136723855921998 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 143265939.

The product of its digits is 1763596800, while the sum is 78.

The spelling of 136723855921998 in words is "one hundred thirty-six trillion, seven hundred twenty-three billion, eight hundred fifty-five million, nine hundred twenty-one thousand, nine hundred ninety-eight".