1451664441321 has 4 divisors (see below), whose sum is σ = 1935552588432. Its totient is φ = 967776294212.

The previous prime is 1451664441313. The next prime is 1451664441373. The reversal of 1451664441321 is 1231444661541.

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 1451664441321 - 2³ = 1451664441313 is a prime.

It is a super-2 number, since 2×1451664441321² (a number of 25 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (1451664441301) 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, 241944073551 + ... + 241944073556.

It is an arithmetic number, because the mean of its divisors is an integer number (483888147108).

Almost surely, 2^{1451664441321} is an apocalyptic number.

It is an amenable number.

1451664441321 is a deficient number, since it is larger than the sum of its proper divisors (483888147111).

1451664441321 is an equidigital number, since it uses as much as digits as its factorization.

1451664441321 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 483888147110.

The product of its digits is 276480, while the sum is 42.

The spelling of 1451664441321 in words is "one trillion, four hundred fifty-one billion, six hundred sixty-four million, four hundred forty-one thousand, three hundred twenty-one".