136634728857 has 16 divisors (see below), whose sum is σ = 198777416448. Its totient is φ = 82793929680.

The previous prime is 136634728831. The next prime is 136634728903. The reversal of 136634728857 is 758827436631.

It is a happy number.

It is not a de Polignac number, because 136634728857 - 2¹⁰ = 136634727833 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 136634728857.

It is not an unprimeable number, because it can be changed into a prime (136634728957) 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, 188563 + ... + 555720.

It is an arithmetic number, because the mean of its divisors is an integer number (12423588528).

Almost surely, 2^136634728857 is an apocalyptic number.

It is an amenable number.

136634728857 is a deficient number, since it is larger than the sum of its proper divisors (62142687591).

136634728857 is a wasteful number, since it uses less digits than its factorization.

136634728857 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 749860.

The product of its digits is 40642560, while the sum is 60.

The spelling of 136634728857 in words is "one hundred thirty-six billion, six hundred thirty-four million, seven hundred twenty-eight thousand, eight hundred fifty-seven".