451046421431661 has 32 divisors (see below), whose sum is σ = 656257119141888. Its totient is φ = 273282474003840.

The previous prime is 451046421431621. The next prime is 451046421431663. The reversal of 451046421431661 is 166134124640154.

It is not a de Polignac number, because 451046421431661 - 2⁹ = 451046421431149 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 451046421431661.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (451046421431663) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 5126823505 + ... + 5126911481.

It is an arithmetic number, because the mean of its divisors is an integer number (20508034973184).

Almost surely, 2^{451046421431661} is an apocalyptic number.

It is an amenable number.

451046421431661 is a deficient number, since it is larger than the sum of its proper divisors (205210697710227).

451046421431661 is a wasteful number, since it uses less digits than its factorization.

451046421431661 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 131121.

The product of its (nonzero) digits is 1658880, while the sum is 48.

The spelling of 451046421431661 in words is "four hundred fifty-one trillion, forty-six billion, four hundred twenty-one million, four hundred thirty-one thousand, six hundred sixty-one".