36138890061 has 6 divisors (see below), whose sum is σ = 52200618990. Its totient is φ = 24092593368.

The previous prime is 36138890023. The next prime is 36138890087. The reversal of 36138890061 is 16009883163.

It is a happy number.

It can be written as a sum of positive squares in only one way, i.e., 21193827561 + 14945062500 = 145581^2 + 122250^2 .

It is a de Polignac number, because none of the positive numbers 2^k-36138890061 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 36138889989 and 36138890016.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (36138890561) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 2007716106 + ... + 2007716123.

It is an arithmetic number, because the mean of its divisors is an integer number (8700103165).

Almost surely, 2^36138890061 is an apocalyptic number.

It is an amenable number.

36138890061 is a deficient number, since it is larger than the sum of its proper divisors (16061728929).

36138890061 is a wasteful number, since it uses less digits than its factorization.

36138890061 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4015432235 (or 4015432232 counting only the distinct ones).

The product of its (nonzero) digits is 186624, while the sum is 45.

The spelling of 36138890061 in words is "thirty-six billion, one hundred thirty-eight million, eight hundred ninety thousand, sixty-one".