135869121936 has 30 divisors (see below), whose sum is σ = 380244834710. Its totient is φ = 45289707264.

The previous prime is 135869121929. The next prime is 135869121991. The reversal of 135869121936 is 639121968531.

135869121936 is a `hidden beast` number, since 1 + 3 + 586 + 9 + 1 + 21 + 9 + 36 = 666.

135869121936 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in only one way, i.e., 135612481536 + 256640400 = 368256^2 + 16020^2 .

It is a super-3 number, since 3×135869121936³ (a number of 34 digits) contains 333 as substring.

It is a hoax number, since the sum of its digits (54) coincides with the sum of the digits of its distinct prime factors.

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 471767641 + ... + 471767928.

Almost surely, 2^135869121936 is an apocalyptic number.

135869121936 is a gapful number since it is divisible by the number (16) formed by its first and last digit.

It is an amenable number.

135869121936 is an abundant number, since it is smaller than the sum of its proper divisors (244375712774).

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

135869121936 is a wasteful number, since it uses less digits than its factorization.

135869121936 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 943535583 (or 943535574 counting only the distinct ones).

The product of its digits is 2099520, while the sum is 54.

The spelling of 135869121936 in words is "one hundred thirty-five billion, eight hundred sixty-nine million, one hundred twenty-one thousand, nine hundred thirty-six".