6408070861 has 4 divisors (see below), whose sum is σ = 6426538272. Its totient is φ = 6389603452.

The previous prime is 6408070843. The next prime is 6408070873. The reversal of 6408070861 is 1680708046.

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, and also an emirpimes, since its reverse is a distinct semiprime: 1680708046 = 2 ⋅840354023.

It is a cyclic number.

It is not a de Polignac number, because 6408070861 - 2³¹ = 4260587213 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (6408070561) 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, 9233185 + ... + 9233878.

It is an arithmetic number, because the mean of its divisors is an integer number (1606634568).

Almost surely, 2^6408070861 is an apocalyptic number.

It is an amenable number.

6408070861 is a deficient number, since it is larger than the sum of its proper divisors (18467411).

6408070861 is a wasteful number, since it uses less digits than its factorization.

6408070861 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 18467410.

The product of its (nonzero) digits is 64512, while the sum is 40.

The square root of 6408070861 is about 80050.4269882429. The cubic root of 6408070861 is about 1857.4156559879.

The spelling of 6408070861 in words is "six billion, four hundred eight million, seventy thousand, eight hundred sixty-one".