39945039122 has 4 divisors (see below), whose sum is σ = 59917558686. Its totient is φ = 19972519560.

The previous prime is 39945039091. The next prime is 39945039149. The reversal of 39945039122 is 22193054993.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 22193054993 = 19387 ⋅1144739.

It can be written as a sum of positive squares in only one way, i.e., 32598663601 + 7346375521 = 180551^2 + 85711^2 .

It is a super-2 number, since 2×39945039122² (a number of 22 digits) contains 22 as substring.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 9986259779 + ... + 9986259782.

Almost surely, 2^39945039122 is an apocalyptic number.

39945039122 is a deficient number, since it is larger than the sum of its proper divisors (19972519564).

39945039122 is a wasteful number, since it uses less digits than its factorization.

39945039122 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 19972519563.

The product of its (nonzero) digits is 524880, while the sum is 47.

The spelling of 39945039122 in words is "thirty-nine billion, nine hundred forty-five million, thirty-nine thousand, one hundred twenty-two".