450640690512 has 80 divisors (see below), whose sum is σ = 1182425599680. Its totient is φ = 147864185856.

The previous prime is 450640690457. The next prime is 450640690571. The reversal of 450640690512 is 215096046054.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1657203 + ... + 1909869.

It is an arithmetic number, because the mean of its divisors is an integer number (14780319996).

Almost surely, 2^450640690512 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 450640690512, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (591212799840).

450640690512 is an abundant number, since it is smaller than the sum of its proper divisors (731784909168).

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

450640690512 is a wasteful number, since it uses less digits than its factorization.

450640690512 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 253260 (or 253254 counting only the distinct ones).

The product of its (nonzero) digits is 259200, while the sum is 42.

The spelling of 450640690512 in words is "four hundred fifty billion, six hundred forty million, six hundred ninety thousand, five hundred twelve".