39785445081 has 32 divisors (see below), whose sum is σ = 59879237120. Its totient is φ = 26103192192.

The previous prime is 39785445079. The next prime is 39785445101. The reversal of 39785445081 is 18054458793.

39785445081 is a `hidden beast` number, since 3 + 97 + 8 + 5 + 44 + 508 + 1 = 666.

It is not a de Polignac number, because 39785445081 - 2¹ = 39785445079 is a prime.

It is a super-2 number, since 2×39785445081² (a number of 22 digits) contains 22 as substring.

It is a hoax number, since the sum of its digits (54) coincides with the sum of the digits of its distinct prime factors.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (39785445061) 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 31 ways as a sum of consecutive naturals, for example, 890775 + ... + 934371.

It is an arithmetic number, because the mean of its divisors is an integer number (1871226160).

Almost surely, 2^39785445081 is an apocalyptic number.

It is an amenable number.

39785445081 is a deficient number, since it is larger than the sum of its proper divisors (20093792039).

39785445081 is a wasteful number, since it uses less digits than its factorization.

39785445081 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 44142 (or 44136 counting only the distinct ones).

The product of its (nonzero) digits is 4838400, while the sum is 54.

The spelling of 39785445081 in words is "thirty-nine billion, seven hundred eighty-five million, four hundred forty-five thousand, eighty-one".