36640343737 has 4 divisors (see below), whose sum is σ = 36641198196. Its totient is φ = 36639489280.

The previous prime is 36640343723. The next prime is 36640343743. The reversal of 36640343737 is 73734304663.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 22381356816 + 14258986921 = 149604^2 + 119411^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-36640343737 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (36640343777) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 359308 + ... + 449869.

It is an arithmetic number, because the mean of its divisors is an integer number (9160299549).

Almost surely, 2^36640343737 is an apocalyptic number.

It is an amenable number.

36640343737 is a deficient number, since it is larger than the sum of its proper divisors (854459).

36640343737 is an equidigital number, since it uses as much as digits as its factorization.

36640343737 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 854458.

The product of its (nonzero) digits is 2286144, while the sum is 46.

It can be divided in two parts, 36640343 and 737, that added together give a triangular number (36641080 = T₈₅₆₀).

The spelling of 36640343737 in words is "thirty-six billion, six hundred forty million, three hundred forty-three thousand, seven hundred thirty-seven".