39940361701 has 4 divisors (see below), whose sum is σ = 40389129900. Its totient is φ = 39491593504.

The previous prime is 39940361687. The next prime is 39940361711. The reversal of 39940361701 is 10716304993.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 10716304993 = 29221 ⋅366733.

It can be written as a sum of positive squares in 2 ways, for example, as 6154245601 + 33786116100 = 78449^2 + 183810^2 .

It is a cyclic number.

It is not a de Polignac number, because 39940361701 - 2²¹ = 39938264549 is a prime.

It is a super-2 number, since 2×39940361701² (a number of 22 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (39940361711) by changing a digit.

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 in 3 ways as a sum of consecutive naturals, for example, 224383966 + ... + 224384143.

It is an arithmetic number, because the mean of its divisors is an integer number (10097282475).

Almost surely, 2^39940361701 is an apocalyptic number.

It is an amenable number.

39940361701 is a deficient number, since it is larger than the sum of its proper divisors (448768199).

39940361701 is an equidigital number, since it uses as much as digits as its factorization.

39940361701 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 448768198.

The product of its (nonzero) digits is 122472, while the sum is 43.

The spelling of 39940361701 in words is "thirty-nine billion, nine hundred forty million, three hundred sixty-one thousand, seven hundred one".