451721267000 has 64 divisors (see below), whose sum is σ = 1057624776000. Its totient is φ = 180586454400.

The previous prime is 451721266993. The next prime is 451721267003. The reversal of 451721267000 is 762127154.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (451721267003) 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, 1656326 + ... + 1909674.

It is an arithmetic number, because the mean of its divisors is an integer number (16525387125).

Almost surely, 2^451721267000 is an apocalyptic number.

451721267000 is a gapful number since it is divisible by the number (40) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 451721267000, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (528812388000).

451721267000 is an abundant number, since it is smaller than the sum of its proper divisors (605903509000).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

451721267000 is a wasteful number, since it uses less digits than its factorization.

451721267000 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 255153 (or 255139 counting only the distinct ones).

The product of its (nonzero) digits is 23520, while the sum is 35.

The spelling of 451721267000 in words is "four hundred fifty-one billion, seven hundred twenty-one million, two hundred sixty-seven thousand".