39746394691 has 4 divisors (see below), whose sum is σ = 41474498832. Its totient is φ = 38018290552.

The previous prime is 39746394647. The next prime is 39746394697. The reversal of 39746394691 is 19649364793.

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

It is a cyclic number.

It is not a de Polignac number, because 39746394691 - 2¹¹ = 39746392643 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (39746394697) 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, 864052036 + ... + 864052081.

It is an arithmetic number, because the mean of its divisors is an integer number (10368624708).

Almost surely, 2^39746394691 is an apocalyptic number.

39746394691 is a deficient number, since it is larger than the sum of its proper divisors (1728104141).

39746394691 is a wasteful number, since it uses less digits than its factorization.

39746394691 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1728104140.

The product of its digits is 26453952, while the sum is 61.

The spelling of 39746394691 in words is "thirty-nine billion, seven hundred forty-six million, three hundred ninety-four thousand, six hundred ninety-one".