39785340681 has 24 divisors (see below), whose sum is σ = 61344354240. Its totient is φ = 24773666400.

The previous prime is 39785340659. The next prime is 39785340689. The reversal of 39785340681 is 18604358793.

39785340681 is a `hidden beast` number, since 39 + 78 + 534 + 0 + 6 + 8 + 1 = 666.

It is not a de Polignac number, because 39785340681 - 2¹⁴ = 39785324297 is a prime.

It is a super-2 number, since 2×39785340681² (a number of 22 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (39785340689) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 1626330 + ... + 1650611.

It is an arithmetic number, because the mean of its divisors is an integer number (2556014760).

Almost surely, 2^39785340681 is an apocalyptic number.

It is an amenable number.

39785340681 is a deficient number, since it is larger than the sum of its proper divisors (21559013559).

39785340681 is a wasteful number, since it uses less digits than its factorization.

39785340681 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3277037 (or 3277034 counting only the distinct ones).

The product of its (nonzero) digits is 4354560, while the sum is 54.

The spelling of 39785340681 in words is "thirty-nine billion, seven hundred eighty-five million, three hundred forty thousand, six hundred eighty-one".