136661025739 has 16 divisors (see below), whose sum is σ = 165533760000. Its totient is φ = 110139260544.

The previous prime is 136661025737. The next prime is 136661025749. The reversal of 136661025739 is 937520166631.

It is not a de Polignac number, because 136661025739 - 2¹ = 136661025737 is a prime.

It is a super-2 number, since 2×136661025739² (a number of 23 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 136661025692 and 136661025701.

It is not an unprimeable number, because it can be changed into a prime (136661025737) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 442239 + ... + 684760.

It is an arithmetic number, because the mean of its divisors is an integer number (10345860000).

Almost surely, 2^136661025739 is an apocalyptic number.

136661025739 is a deficient number, since it is larger than the sum of its proper divisors (28872734261).

136661025739 is a wasteful number, since it uses less digits than its factorization.

136661025739 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1128042.

The product of its (nonzero) digits is 1224720, while the sum is 49.

The spelling of 136661025739 in words is "one hundred thirty-six billion, six hundred sixty-one million, twenty-five thousand, seven hundred thirty-nine".