39947145623 has 16 divisors (see below), whose sum is σ = 49816304640. Its totient is φ = 31120101600.

The previous prime is 39947145611. The next prime is 39947145661. The reversal of 39947145623 is 32654174993.

It is not a de Polignac number, because 39947145623 - 2⁶ = 39947145559 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (39947145323) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 268133 + ... + 389601.

It is an arithmetic number, because the mean of its divisors is an integer number (3113519040).

Almost surely, 2^39947145623 is an apocalyptic number.

39947145623 is a deficient number, since it is larger than the sum of its proper divisors (9869159017).

39947145623 is a wasteful number, since it uses less digits than its factorization.

39947145623 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 125758.

The product of its digits is 4898880, while the sum is 53.

The spelling of 39947145623 in words is "thirty-nine billion, nine hundred forty-seven million, one hundred forty-five thousand, six hundred twenty-three".