36778052173 has 2 divisors, whose sum is σ = 36778052174. Its totient is φ = 36778052172.

The previous prime is 36778052159. The next prime is 36778052209. The reversal of 36778052173 is 37125087763.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 34057595209 + 2720456964 = 184547^2 + 52158^2 .

It is a cyclic number.

It is not a de Polignac number, because 36778052173 - 2⁵ = 36778052141 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (36778052123) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 18389026086 + 18389026087.

It is an arithmetic number, because the mean of its divisors is an integer number (18389026087).

Almost surely, 2^36778052173 is an apocalyptic number.

It is an amenable number.

36778052173 is a deficient number, since it is larger than the sum of its proper divisors (1).

36778052173 is an equidigital number, since it uses as much as digits as its factorization.

36778052173 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1481760, while the sum is 49.

The spelling of 36778052173 in words is "thirty-six billion, seven hundred seventy-eight million, fifty-two thousand, one hundred seventy-three".