36194879781 has 8 divisors (see below), whose sum is σ = 53622044160. Its totient is φ = 24129919836.

The previous prime is 36194879767. The next prime is 36194879789. The reversal of 36194879781 is 18797849163.

36194879781 is a `hidden beast` number, since 3 + 61 + 9 + 487 + 97 + 8 + 1 = 666.

It is not a de Polignac number, because 36194879781 - 2¹⁹ = 36194355493 is a prime.

It is a super-2 number, since 2×36194879781² (a number of 22 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (36194879789) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 670275525 + ... + 670275578.

It is an arithmetic number, because the mean of its divisors is an integer number (6702755520).

Almost surely, 2^36194879781 is an apocalyptic number.

It is an amenable number.

36194879781 is a deficient number, since it is larger than the sum of its proper divisors (17427164379).

36194879781 is a wasteful number, since it uses less digits than its factorization.

36194879781 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1340551112 (or 1340551106 counting only the distinct ones).

The product of its digits is 18289152, while the sum is 63.

The spelling of 36194879781 in words is "thirty-six billion, one hundred ninety-four million, eight hundred seventy-nine thousand, seven hundred eighty-one".