39875467861 has 4 divisors (see below), whose sum is σ = 39887850924. Its totient is φ = 39863084800.

The previous prime is 39875467859. The next prime is 39875467901. The reversal of 39875467861 is 16876457893.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 16876457893 = 64567 ⋅261379.

It can be written as a sum of positive squares in 2 ways, for example, as 11996820900 + 27878646961 = 109530^2 + 166969^2 .

It is a cyclic number.

It is not a de Polignac number, because 39875467861 - 2¹ = 39875467859 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 39875467793 and 39875467802.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (39875407861) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 6186700 + ... + 6193141.

It is an arithmetic number, because the mean of its divisors is an integer number (9971962731).

Almost surely, 2^39875467861 is an apocalyptic number.

It is an amenable number.

39875467861 is a deficient number, since it is larger than the sum of its proper divisors (12383063).

39875467861 is a wasteful number, since it uses less digits than its factorization.

39875467861 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12383062.

The product of its digits is 60963840, while the sum is 64.

The spelling of 39875467861 in words is "thirty-nine billion, eight hundred seventy-five million, four hundred sixty-seven thousand, eight hundred sixty-one".