10211857857 has 24 divisors (see below), whose sum is σ = 16440147360. Its totient is φ = 6070204800.

The previous prime is 10211857849. The next prime is 10211857867. The reversal of 10211857857 is 75875811201.

10211857857 is a `hidden beast` number, since 1 + 0 + 21 + 1 + 8 + 578 + 57 = 666.

It is not a de Polignac number, because 10211857857 - 2³ = 10211857849 is a prime.

It is not an unprimeable number, because it can be changed into a prime (10211857867) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 1753519 + ... + 1759332.

It is an arithmetic number, because the mean of its divisors is an integer number (685006140).

Almost surely, 2^10211857857 is an apocalyptic number.

10211857857 is a gapful number since it is divisible by the number (17) formed by its first and last digit.

It is an amenable number.

10211857857 is a deficient number, since it is larger than the sum of its proper divisors (6228289503).

10211857857 is a wasteful number, since it uses less digits than its factorization.

10211857857 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3512893 (or 3512890 counting only the distinct ones).

The product of its (nonzero) digits is 156800, while the sum is 45.

The spelling of 10211857857 in words is "ten billion, two hundred eleven million, eight hundred fifty-seven thousand, eight hundred fifty-seven".