39738218497 has 4 divisors (see below), whose sum is σ = 40004918100. Its totient is φ = 39471518896.

The previous prime is 39738218489. The next prime is 39738218501. The reversal of 39738218497 is 79481283793.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 79481283793 = 23 ⋅3455707991.

It can be written as a sum of positive squares in 2 ways, for example, as 1284577281 + 38453641216 = 35841^2 + 196096^2 .

It is a cyclic number.

It is not a de Polignac number, because 39738218497 - 2³ = 39738218489 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (39738218197) 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, 133349578 + ... + 133349875.

It is an arithmetic number, because the mean of its divisors is an integer number (10001229525).

Almost surely, 2^39738218497 is an apocalyptic number.

It is an amenable number.

39738218497 is a deficient number, since it is larger than the sum of its proper divisors (266699603).

39738218497 is a wasteful number, since it uses less digits than its factorization.

39738218497 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 266699602.

The product of its digits is 18289152, while the sum is 61.

The spelling of 39738218497 in words is "thirty-nine billion, seven hundred thirty-eight million, two hundred eighteen thousand, four hundred ninety-seven".