136605345621 has 16 divisors (see below), whose sum is σ = 182954453760. Its totient is φ = 90663372800.

The previous prime is 136605345599. The next prime is 136605345623. The reversal of 136605345621 is 126543506631.

It is a cyclic number.

It is not a de Polignac number, because 136605345621 - 2⁶ = 136605345557 is a prime.

It is a super-2 number, since 2×136605345621² (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 (136605345623) 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, 4984885 + ... + 5012213.

It is an arithmetic number, because the mean of its divisors is an integer number (11434653360).

Almost surely, 2^136605345621 is an apocalyptic number.

It is an amenable number.

136605345621 is a deficient number, since it is larger than the sum of its proper divisors (46349108139).

136605345621 is a wasteful number, since it uses less digits than its factorization.

136605345621 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 34716.

The product of its (nonzero) digits is 388800, while the sum is 42.

The spelling of 136605345621 in words is "one hundred thirty-six billion, six hundred five million, three hundred forty-five thousand, six hundred twenty-one".