1801664895 has 8 divisors (see below), whose sum is σ = 2882663856. Its totient is φ = 960887936.

The previous prime is 1801664857. The next prime is 1801664897. The reversal of 1801664895 is 5984661081.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 1801664895 - 2⁹ = 1801664383 is a prime.

It is a super-2 number, since 2×1801664895² = 6491992787750722050, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1801664897) 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, 60055482 + ... + 60055511.

It is an arithmetic number, because the mean of its divisors is an integer number (360332982).

Almost surely, 2^1801664895 is an apocalyptic number.

1801664895 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

1801664895 is a deficient number, since it is larger than the sum of its proper divisors (1080998961).

1801664895 is a wasteful number, since it uses less digits than its factorization.

1801664895 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 120111001.

The product of its (nonzero) digits is 414720, while the sum is 48.

The square root of 1801664895 is about 42446.0233119665. The cubic root of 1801664895 is about 1216.8153290124.

The spelling of 1801664895 in words is "one billion, eight hundred one million, six hundred sixty-four thousand, eight hundred ninety-five".