36697561709 has 2 divisors, whose sum is σ = 36697561710. Its totient is φ = 36697561708.

The previous prime is 36697561687. The next prime is 36697561739. The reversal of 36697561709 is 90716579663.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 26359146025 + 10338415684 = 162355^2 + 101678^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-36697561709 is a prime.

It is a super-2 number, since 2×36697561709² (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 (36697561739) 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 as a sum of consecutive naturals, namely, 18348780854 + 18348780855.

It is an arithmetic number, because the mean of its divisors is an integer number (18348780855).

Almost surely, 2^36697561709 is an apocalyptic number.

It is an amenable number.

36697561709 is a deficient number, since it is larger than the sum of its proper divisors (1).

36697561709 is an equidigital number, since it uses as much as digits as its factorization.

36697561709 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 12859560, while the sum is 59.

The spelling of 36697561709 in words is "thirty-six billion, six hundred ninety-seven million, five hundred sixty-one thousand, seven hundred nine".