451661503661 has 8 divisors (see below), whose sum is σ = 468290760480. Its totient is φ = 435102561712.

The previous prime is 451661503627. The next prime is 451661503693. The reversal of 451661503661 is 166305166154.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 451661503661 - 2¹⁸ = 451661241517 is a prime.

It is a super-2 number, since 2×451661503661² (a number of 24 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (451661503361) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 17565635 + ... + 17591328.

It is an arithmetic number, because the mean of its divisors is an integer number (58536345060).

Almost surely, 2^451661503661 is an apocalyptic number.

It is an amenable number.

451661503661 is a deficient number, since it is larger than the sum of its proper divisors (16629256819).

451661503661 is a wasteful number, since it uses less digits than its factorization.

451661503661 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 35157435.

The product of its (nonzero) digits is 388800, while the sum is 44.

The spelling of 451661503661 in words is "four hundred fifty-one billion, six hundred sixty-one million, five hundred three thousand, six hundred sixty-one".