39690218361 has 4 divisors (see below), whose sum is σ = 52920291152. Its totient is φ = 26460145572.

The previous prime is 39690218297. The next prime is 39690218369. The reversal of 39690218361 is 16381209693.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is not a de Polignac number, because 39690218361 - 2⁶ = 39690218297 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 39690218361.

It is not an unprimeable number, because it can be changed into a prime (39690218369) 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, 6615036391 + ... + 6615036396.

It is an arithmetic number, because the mean of its divisors is an integer number (13230072788).

Almost surely, 2^39690218361 is an apocalyptic number.

It is an amenable number.

39690218361 is a deficient number, since it is larger than the sum of its proper divisors (13230072791).

39690218361 is a wasteful number, since it uses less digits than its factorization.

39690218361 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13230072790.

The product of its (nonzero) digits is 419904, while the sum is 48.

The spelling of 39690218361 in words is "thirty-nine billion, six hundred ninety million, two hundred eighteen thousand, three hundred sixty-one".