39954358081 has 4 divisors (see below), whose sum is σ = 43586572464. Its totient is φ = 36322143700.

The previous prime is 39954358079. The next prime is 39954358109. The reversal of 39954358081 is 18085345993.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 39954358081 - 2¹ = 39954358079 is a prime.

It is a super-2 number, since 2×39954358081² (a number of 22 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (39954358781) 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 3 ways as a sum of consecutive naturals, for example, 1816107175 + ... + 1816107196.

It is an arithmetic number, because the mean of its divisors is an integer number (10896643116).

Almost surely, 2^39954358081 is an apocalyptic number.

It is an amenable number.

39954358081 is a deficient number, since it is larger than the sum of its proper divisors (3632214383).

39954358081 is a wasteful number, since it uses less digits than its factorization.

39954358081 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3632214382.

The product of its (nonzero) digits is 4665600, while the sum is 55.

The spelling of 39954358081 in words is "thirty-nine billion, nine hundred fifty-four million, three hundred fifty-eight thousand, eighty-one".