18860857641 has 8 divisors (see below), whose sum is σ = 27942011360. Its totient is φ = 12573905076.

The previous prime is 18860857583. The next prime is 18860857657. The reversal of 18860857641 is 14675806881.

It is a happy number.

18860857641 is a `hidden beast` number, since 1 + 8 + 8 + 60 + 8 + 576 + 4 + 1 = 666.

It is not a de Polignac number, because 18860857641 - 2¹¹ = 18860855593 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (18860837641) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 349275115 + ... + 349275168.

It is an arithmetic number, because the mean of its divisors is an integer number (3492751420).

Almost surely, 2^18860857641 is an apocalyptic number.

It is an amenable number.

18860857641 is a deficient number, since it is larger than the sum of its proper divisors (9081153719).

18860857641 is an equidigital number, since it uses as much as digits as its factorization.

18860857641 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 698550292 (or 698550286 counting only the distinct ones).

The product of its (nonzero) digits is 2580480, while the sum is 54.

The spelling of 18860857641 in words is "eighteen billion, eight hundred sixty million, eight hundred fifty-seven thousand, six hundred forty-one".