136923470258 has 16 divisors (see below), whose sum is σ = 206621078040. Its totient is φ = 68049964416.

The previous prime is 136923470237. The next prime is 136923470263. The reversal of 136923470258 is 852074329631.

It can be written as a sum of positive squares in 4 ways, for example, as 131372177209 + 5551293049 = 362453^2 + 74507^2 .

It is a Curzon number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1497728 + ... + 1586516.

It is a 2-persistent number, because it is pandigital, and so is 2⋅136923470258 = 273846940516, but 3⋅136923470258 = 410770410774 is not.

Almost surely, 2^136923470258 is an apocalyptic number.

136923470258 is a deficient number, since it is larger than the sum of its proper divisors (69697607782).

136923470258 is a wasteful number, since it uses less digits than its factorization.

136923470258 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 93421.

The product of its (nonzero) digits is 2177280, while the sum is 50.

Adding to 136923470258 its reverse (852074329631), we get a palindrome (988997799889).

The spelling of 136923470258 in words is "one hundred thirty-six billion, nine hundred twenty-three million, four hundred seventy thousand, two hundred fifty-eight".