39794412942649 has 4 divisors (see below), whose sum is σ = 39814340041764. Its totient is φ = 39774485843536.

The previous prime is 39794412942517. The next prime is 39794412942659. The reversal of 39794412942649 is 94624921449793.

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 256915169424 + 39537497773225 = 506868^2 + 6287885^2 .

It is a cyclic number.

It is not a de Polignac number, because 39794412942649 - 2²³ = 39794404554041 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (39794412942659) 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, 9963546562 + ... + 9963550555.

It is an arithmetic number, because the mean of its divisors is an integer number (9953585010441).

Almost surely, 2^{39794412942649} is an apocalyptic number.

It is an amenable number.

39794412942649 is a deficient number, since it is larger than the sum of its proper divisors (19927099115).

39794412942649 is a wasteful number, since it uses less digits than its factorization.

39794412942649 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 19927099114.

The product of its digits is 846526464, while the sum is 73.

The spelling of 39794412942649 in words is "thirty-nine trillion, seven hundred ninety-four billion, four hundred twelve million, nine hundred forty-two thousand, six hundred forty-nine".