451661357 has 4 divisors (see below), whose sum is σ = 516184416. Its totient is φ = 387138300.

The previous prime is 451661333. The next prime is 451661359. The reversal of 451661357 is 753166154.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 451661357 - 2¹⁶ = 451595821 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 451661357.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (451661359) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 32261519 + ... + 32261532.

It is an arithmetic number, because the mean of its divisors is an integer number (129046104).

Almost surely, 2^451661357 is an apocalyptic number.

It is an amenable number.

451661357 is a deficient number, since it is larger than the sum of its proper divisors (64523059).

451661357 is an equidigital number, since it uses as much as digits as its factorization.

451661357 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 64523058.

The product of its digits is 75600, while the sum is 38.

The square root of 451661357 is about 21252.3259197670. The cubic root of 451661357 is about 767.2513212879.

The spelling of 451661357 in words is "four hundred fifty-one million, six hundred sixty-one thousand, three hundred fifty-seven".