451661101009 has 4 divisors (see below), whose sum is σ = 451663918704. Its totient is φ = 451658283316.

The previous prime is 451661100983. The next prime is 451661101049. The reversal of 451661101009 is 900101166154.

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 451661101009 - 2⁷ = 451661100881 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (451661101049) 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, 1152907 + ... + 1494160.

It is an arithmetic number, because the mean of its divisors is an integer number (112915979676).

Almost surely, 2^451661101009 is an apocalyptic number.

It is an amenable number.

451661101009 is a deficient number, since it is larger than the sum of its proper divisors (2817695).

451661101009 is a wasteful number, since it uses less digits than its factorization.

451661101009 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2817694.

The product of its (nonzero) digits is 6480, while the sum is 34.

The spelling of 451661101009 in words is "four hundred fifty-one billion, six hundred sixty-one million, one hundred one thousand, nine".