39520313661 has 16 divisors (see below), whose sum is σ = 58219185024. Its totient is φ = 23718925824.

The previous prime is 39520313653. The next prime is 39520313669. The reversal of 39520313661 is 16631302593.

It is an interprime number because it is at equal distance from previous prime (39520313653) and next prime (39520313669).

It is not a de Polignac number, because 39520313661 - 2³ = 39520313653 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (39520313669) 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, 16844656 + ... + 16847001.

It is an arithmetic number, because the mean of its divisors is an integer number (3638699064).

Almost surely, 2^39520313661 is an apocalyptic number.

It is an amenable number.

39520313661 is a deficient number, since it is larger than the sum of its proper divisors (18698871363).

39520313661 is a wasteful number, since it uses less digits than its factorization.

39520313661 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 33691700.

The product of its (nonzero) digits is 87480, while the sum is 39.

The spelling of 39520313661 in words is "thirty-nine billion, five hundred twenty million, three hundred thirteen thousand, six hundred sixty-one".