136924421089 has 3 divisors (see below), whose sum is σ = 136924791123.
Its totient is φ = 136924051056.
The previous prime is 136924420981. The next prime is 136924421093. The reversal of 136924421089 is 980124429631.
Multipling 136924421089 by its sum of digits (49), we get a square (6709296633361 = 25902312).
It is a happy number.
The square root of 136924421089 is 370033.
It is a perfect power (a square), and thus also a powerful number.
It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.
It can be written as a sum of positive squares in only one way, i.e., 80846392225 + 56078028864 = 284335^2 + 236808^2
It is a de Polignac number, because none of the positive numbers 2k-136924421089 is a prime.
It is a Duffinian number.
It is not an unprimeable number, because it can be changed into a prime (136924421489) by changing a digit.
It is a polite number, since it can be written in 2 ways as a sum of consecutive naturals, for example, 185017 + ... + 555049.
It is an arithmetic number, because the mean of its divisors is an integer number (45641597041).
Almost surely, 2136924421089 is an apocalyptic number.
136924421089 is the 370033-rd square number.
136924421089 is the 185017-th centered octagonal number.
It is an amenable number.
136924421089 is a deficient number, since it is larger than the sum of its proper divisors (370034).
136924421089 is an frugal number, since it uses more digits than its factorization.
136924421089 is an evil number, because the sum of its binary digits is even.
The sum of its prime factors is 740066 (or 370033 counting only the distinct ones).
The product of its (nonzero) digits is 746496, while the sum is 49.
The spelling of 136924421089 in words is "one hundred thirty-six billion, nine hundred twenty-four million, four hundred twenty-one thousand, eighty-nine".