136690136690 has 32 divisors (see below), whose sum is σ = 248521584240. Its totient is φ = 54125280000.

The previous prime is 136690136689. The next prime is 136690136717. The reversal of 136690136690 is 96631096631.

It is a happy number.

It can be written as a sum of positive squares in 8 ways, for example, as 134100242809 + 2589893881 = 366197^2 + 50891^2 .

It is a super-2 number, since 2×136690136690² (a number of 23 digits) contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 9993176 + ... + 10006844.

Almost surely, 2^136690136690 is an apocalyptic number.

136690136690 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

136690136690 is a deficient number, since it is larger than the sum of its proper divisors (111831447550).

136690136690 is a wasteful number, since it uses less digits than its factorization.

136690136690 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 23678.

The product of its (nonzero) digits is 944784, while the sum is 50.

The spelling of 136690136690 in words is "one hundred thirty-six billion, six hundred ninety million, one hundred thirty-six thousand, six hundred ninety".