3858655798869 has 4 divisors (see below), whose sum is σ = 5144874398496. Its totient is φ = 2572437199244.

The previous prime is 3858655798861. The next prime is 3858655798873. The reversal of 3858655798869 is 9688975568583.

It is a happy number.

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.

It is a cyclic number.

It is not a de Polignac number, because 3858655798869 - 2³ = 3858655798861 is a prime.

It is a super-2 number, since 2×3858655798869² (a number of 26 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (3858655798861) 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, 643109299809 + ... + 643109299814.

It is an arithmetic number, because the mean of its divisors is an integer number (1286218599624).

Almost surely, 2^{3858655798869} is an apocalyptic number.

It is an amenable number.

3858655798869 is a deficient number, since it is larger than the sum of its proper divisors (1286218599627).

3858655798869 is a wasteful number, since it uses less digits than its factorization.

3858655798869 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1286218599626.

The product of its digits is 31352832000, while the sum is 87.

The spelling of 3858655798869 in words is "three trillion, eight hundred fifty-eight billion, six hundred fifty-five million, seven hundred ninety-eight thousand, eight hundred sixty-nine".