451661265 has 40 divisors (see below), whose sum is σ = 883257408. Its totient is φ = 218985120.

The previous prime is 451661251. The next prime is 451661267. The reversal of 451661265 is 562166154.

It is not a de Polignac number, because 451661265 - 2⁶ = 451661201 is a prime.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (451661267) by changing a digit.

It is a polite number, since it can be written in 39 ways as a sum of consecutive naturals, for example, 46237 + ... + 55146.

Almost surely, 2^451661265 is an apocalyptic number.

451661265 is a gapful number since it is divisible by the number (45) formed by its first and last digit.

It is an amenable number.

451661265 is a deficient number, since it is larger than the sum of its proper divisors (431596143).

451661265 is a wasteful number, since it uses less digits than its factorization.

451661265 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 101411 (or 101402 counting only the distinct ones).

The product of its digits is 43200, while the sum is 36.

The square root of 451661265 is about 21252.3237552979. The cubic root of 451661265 is about 767.2512691935.

The spelling of 451661265 in words is "four hundred fifty-one million, six hundred sixty-one thousand, two hundred sixty-five".