39981822639 has 16 divisors (see below), whose sum is σ = 58396698624. Its totient is φ = 24130857600.

The previous prime is 39981822611. The next prime is 39981822653. The reversal of 39981822639 is 93622818993.

It is not a de Polignac number, because 39981822639 - 2¹³ = 39981814447 is a prime.

It is a super-2 number, since 2×39981822639² (a number of 22 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (39981822539) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 2505679 + ... + 2521584.

It is an arithmetic number, because the mean of its divisors is an integer number (3649793664).

Almost surely, 2^39981822639 is an apocalyptic number.

39981822639 is a deficient number, since it is larger than the sum of its proper divisors (18414875985).

39981822639 is a wasteful number, since it uses less digits than its factorization.

39981822639 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5027518.

The product of its digits is 10077696, while the sum is 60.

The spelling of 39981822639 in words is "thirty-nine billion, nine hundred eighty-one million, eight hundred twenty-two thousand, six hundred thirty-nine".