136078728831 has 24 divisors (see below), whose sum is σ = 199228004976. Its totient is φ = 89490234240.

The previous prime is 136078728829. The next prime is 136078728889. The reversal of 136078728831 is 138827870631.

136078728831 is a `hidden beast` number, since 1 + 3 + 607 + 8 + 7 + 28 + 8 + 3 + 1 = 666.

It is not a de Polignac number, because 136078728831 - 2¹ = 136078728829 is a prime.

It is a super-2 number, since 2×136078728831² (a number of 23 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (136078727831) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 355971 + ... + 631563.

It is an arithmetic number, because the mean of its divisors is an integer number (8301166874).

Almost surely, 2^136078728831 is an apocalyptic number.

136078728831 is a deficient number, since it is larger than the sum of its proper divisors (63149276145).

136078728831 is a wasteful number, since it uses less digits than its factorization.

136078728831 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 276343 (or 276340 counting only the distinct ones).

The product of its (nonzero) digits is 2709504, while the sum is 54.

The spelling of 136078728831 in words is "one hundred thirty-six billion, seventy-eight million, seven hundred twenty-eight thousand, eight hundred thirty-one".