39692387968129 has 8 divisors (see below), whose sum is σ = 42932310805160. Its totient is φ = 36479131163136.

The previous prime is 39692387968109. The next prime is 39692387968157. The reversal of 39692387968129 is 92186978329693.

It can be written as a sum of positive squares in 4 ways, for example, as 8882694748225 + 30809693219904 = 2980385^2 + 5550648^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 39692387968129 - 2¹¹ = 39692387966081 is a prime.

It is a super-2 number, since 2×39692387968129² (a number of 28 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (39692387968109) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 6666504912 + ... + 6666510865.

It is an arithmetic number, because the mean of its divisors is an integer number (5366538850645).

Almost surely, 2^{39692387968129} is an apocalyptic number.

It is an amenable number.

39692387968129 is a deficient number, since it is larger than the sum of its proper divisors (3239922837031).

39692387968129 is a wasteful number, since it uses less digits than its factorization.

39692387968129 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13333016019.

The product of its digits is 3809369088, while the sum is 82.

The spelling of 39692387968129 in words is "thirty-nine trillion, six hundred ninety-two billion, three hundred eighty-seven million, nine hundred sixty-eight thousand, one hundred twenty-nine".