36604056781 has 2 divisors, whose sum is σ = 36604056782. Its totient is φ = 36604056780.

The previous prime is 36604056761. The next prime is 36604056829. The reversal of 36604056781 is 18765040663.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 34169522500 + 2434534281 = 184850^2 + 49341^2 .

It is a cyclic number.

It is not a de Polignac number, because 36604056781 - 2¹³ = 36604048589 is a prime.

It is a super-2 number, since 2×36604056781² (a number of 22 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (36604056751) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 18302028390 + 18302028391.

It is an arithmetic number, because the mean of its divisors is an integer number (18302028391).

Almost surely, 2^36604056781 is an apocalyptic number.

It is an amenable number.

36604056781 is a deficient number, since it is larger than the sum of its proper divisors (1).

36604056781 is an equidigital number, since it uses as much as digits as its factorization.

36604056781 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 725760, while the sum is 46.

The spelling of 36604056781 in words is "thirty-six billion, six hundred four million, fifty-six thousand, seven hundred eighty-one".