1903664161 has 27 divisors (see below), whose sum is σ = 2323507473. Its totient is φ = 1555008840.

The previous prime is 1903664129. The next prime is 1903664167. The reversal of 1903664161 is 1614663091.

The square root of 1903664161 is 43631.

It is a perfect power (a square), and thus also a powerful number.

It is not a de Polignac number, because 1903664161 - 2⁵ = 1903664129 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 1903664161.

It is not an unprimeable number, because it can be changed into a prime (1903664167) by changing a digit.

It is a polite number, since it can be written in 26 ways as a sum of consecutive naturals, for example, 7024456 + ... + 7024726.

Almost surely, 2^1903664161 is an apocalyptic number.

1903664161 is the 43631-st square number.

1903664161 is the 21816-th centered octagonal number.

It is an amenable number.

1903664161 is a deficient number, since it is larger than the sum of its proper divisors (419843312).

1903664161 is an frugal number, since it uses more digits than its factorization.

1903664161 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 602 (or 301 counting only the distinct ones).

The product of its (nonzero) digits is 23328, while the sum is 37.

The cubic root of 1903664161 is about 1239.3580098989.

The spelling of 1903664161 in words is "one billion, nine hundred three million, six hundred sixty-four thousand, one hundred sixty-one".