450681861 has 12 divisors (see below), whose sum is σ = 699016992. Its totient is φ = 257532408.

The previous prime is 450681857. The next prime is 450681871. The reversal of 450681861 is 168186054.

It is not a de Polignac number, because 450681861 - 2² = 450681857 is a prime.

It is a super-2 number, since 2×450681861² = 406228279668846642, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (450681821) 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, 1532785 + ... + 1533078.

It is an arithmetic number, because the mean of its divisors is an integer number (58251416).

Almost surely, 2^450681861 is an apocalyptic number.

It is an amenable number.

450681861 is a deficient number, since it is larger than the sum of its proper divisors (248335131).

450681861 is a wasteful number, since it uses less digits than its factorization.

450681861 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3065880 (or 3065873 counting only the distinct ones).

The product of its (nonzero) digits is 46080, while the sum is 39.

The square root of 450681861 is about 21229.2689699858. The cubic root of 450681861 is about 766.6962863373.

The spelling of 450681861 in words is "four hundred fifty million, six hundred eighty-one thousand, eight hundred sixty-one".