136611786761 has 16 divisors (see below), whose sum is σ = 144874833408. Its totient is φ = 128591971200.

The previous prime is 136611786749. The next prime is 136611786791. The reversal of 136611786761 is 167687116631.

It is a happy number.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-136611786761 is a prime.

It is a super-2 number, since 2×136611786761² (a number of 23 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (136611786791) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 4079261 + ... + 4112613.

It is an arithmetic number, because the mean of its divisors is an integer number (9054677088).

Almost surely, 2^136611786761 is an apocalyptic number.

It is an amenable number.

136611786761 is a deficient number, since it is larger than the sum of its proper divisors (8263046647).

136611786761 is a wasteful number, since it uses less digits than its factorization.

136611786761 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 36992.

The product of its digits is 1524096, while the sum is 53.

The spelling of 136611786761 in words is "one hundred thirty-six billion, six hundred eleven million, seven hundred eighty-six thousand, seven hundred sixty-one".