36691785601 has 3 divisors (see below), whose sum is σ = 36691977153. Its totient is φ = 36691594050.

The previous prime is 36691785587. The next prime is 36691785631. The reversal of 36691785601 is 10658719663.

It is a happy number.

The square root of 36691785601 is 191551.

It is a perfect power (a square), and thus also a powerful number.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length, and also an emirpimes, since its reverse is a distinct semiprime: 10658719663 = 12601 ⋅845863.

It is not a de Polignac number, because 36691785601 - 2⁵ = 36691785569 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (36691785631) by changing a digit.

It is a polite number, since it can be written in 2 ways as a sum of consecutive naturals, for example, 95776 + ... + 287326.

It is an arithmetic number, because the mean of its divisors is an integer number (12230659051).

Almost surely, 2^36691785601 is an apocalyptic number.

36691785601 is the 191551-st square number.

36691785601 is the 95776-th centered octagonal number.

It is an amenable number.

36691785601 is a deficient number, since it is larger than the sum of its proper divisors (191552).

36691785601 is an frugal number, since it uses more digits than its factorization.

36691785601 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 383102 (or 191551 counting only the distinct ones).

The product of its (nonzero) digits is 1632960, while the sum is 52.

The spelling of 36691785601 in words is "thirty-six billion, six hundred ninety-one million, seven hundred eighty-five thousand, six hundred one".