855858101 has 4 divisors (see below), whose sum is σ = 978123552. Its totient is φ = 733592652.

The previous prime is 855858053. The next prime is 855858103. The reversal of 855858101 is 101858558.

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 a de Polignac number, because none of the positive numbers 2^k-855858101 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (855858103) 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, 61132715 + ... + 61132728.

It is an arithmetic number, because the mean of its divisors is an integer number (244530888).

Almost surely, 2^855858101 is an apocalyptic number.

It is an amenable number.

855858101 is a deficient number, since it is larger than the sum of its proper divisors (122265451).

855858101 is a wasteful number, since it uses less digits than its factorization.

855858101 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 122265450.

The product of its (nonzero) digits is 64000, while the sum is 41.

The square root of 855858101 is about 29255.0525721626. The cubic root of 855858101 is about 949.4394110934.

The spelling of 855858101 in words is "eight hundred fifty-five million, eight hundred fifty-eight thousand, one hundred one".