451651662351021 has 16 divisors (see below), whose sum is σ = 656977856122368. Its totient is φ = 273715787041200.

The previous prime is 451651662350939. The next prime is 451651662351049. The reversal of 451651662351021 is 120153266156154.

It is not a de Polignac number, because 451651662351021 - 2¹⁹ = 451651661826733 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (451651662352021) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 311595271 + ... + 313041396.

It is an arithmetic number, because the mean of its divisors is an integer number (41061116007648).

Almost surely, 2^{451651662351021} is an apocalyptic number.

It is an amenable number.

451651662351021 is a deficient number, since it is larger than the sum of its proper divisors (205326193771347).

451651662351021 is a wasteful number, since it uses less digits than its factorization.

451651662351021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 624658592.

The product of its (nonzero) digits is 1296000, while the sum is 48.

The spelling of 451651662351021 in words is "four hundred fifty-one trillion, six hundred fifty-one billion, six hundred sixty-two million, three hundred fifty-one thousand, twenty-one".