1864342161 has 12 divisors (see below), whose sum is σ = 2937751440. Its totient is φ = 1129904280.

The previous prime is 1864342157. The next prime is 1864342163. The reversal of 1864342161 is 1612434681.

1864342161 is a `hidden beast` number, since 1 + 8 + 6 + 434 + 216 + 1 = 666.

It is not a de Polignac number, because 1864342161 - 2² = 1864342157 is a prime.

It is not an unprimeable number, because it can be changed into a prime (1864342163) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 9415771 + ... + 9415968.

It is an arithmetic number, because the mean of its divisors is an integer number (244812620).

Almost surely, 2^1864342161 is an apocalyptic number.

1864342161 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

1864342161 is a deficient number, since it is larger than the sum of its proper divisors (1073409279).

1864342161 is a wasteful number, since it uses less digits than its factorization.

1864342161 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 18831756 (or 18831753 counting only the distinct ones).

The product of its digits is 27648, while the sum is 36.

The square root of 1864342161 is about 43178.0286835793. The cubic root of 1864342161 is about 1230.7651970738.

The spelling of 1864342161 in words is "one billion, eight hundred sixty-four million, three hundred forty-two thousand, one hundred sixty-one".