39631413981 has 8 divisors (see below), whose sum is σ = 53042806080. Its totient is φ = 26320482272.

The previous prime is 39631413961. The next prime is 39631414003. The reversal of 39631413981 is 18931413693.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 39631413981 - 2⁹ = 39631413469 is a prime.

It is a super-2 number, since 2×39631413981² (a number of 22 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 39631413981.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (39631413911) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 25114176 + ... + 25115753.

It is an arithmetic number, because the mean of its divisors is an integer number (6630350760).

Almost surely, 2^39631413981 is an apocalyptic number.

It is an amenable number.

39631413981 is a deficient number, since it is larger than the sum of its proper divisors (13411392099).

39631413981 is a wasteful number, since it uses less digits than its factorization.

39631413981 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 50230195.

The product of its digits is 419904, while the sum is 48.

The spelling of 39631413981 in words is "thirty-nine billion, six hundred thirty-one million, four hundred thirteen thousand, nine hundred eighty-one".