451450061332661 has 4 divisors (see below), whose sum is σ = 451450473184800. Its totient is φ = 451449649480524.

The previous prime is 451450061332657. The next prime is 451450061332687. The reversal of 451450061332661 is 166233160054154.

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 451450061332661 - 2² = 451450061332657 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (451450061332601) 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, 204277451 + ... + 206475608.

It is an arithmetic number, because the mean of its divisors is an integer number (112862618296200).

Almost surely, 2^{451450061332661} is an apocalyptic number.

It is an amenable number.

451450061332661 is a deficient number, since it is larger than the sum of its proper divisors (411852139).

451450061332661 is a wasteful number, since it uses less digits than its factorization.

451450061332661 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 411852138.

The product of its (nonzero) digits is 1555200, while the sum is 47.

The spelling of 451450061332661 in words is "four hundred fifty-one trillion, four hundred fifty billion, sixty-one million, three hundred thirty-two thousand, six hundred sixty-one".