451242213540 has 192 divisors, whose sum is σ = 1348972289280. Its totient is φ = 112309125120.

The previous prime is 451242213533. The next prime is 451242213563. The reversal of 451242213540 is 45312242154.

It is an unprimeable number.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 203169630 + ... + 203171850.

It is an arithmetic number, because the mean of its divisors is an integer number (7025897340).

Almost surely, 2^451242213540 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 451242213540, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (674486144640).

451242213540 is an abundant number, since it is smaller than the sum of its proper divisors (897730075740).

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

451242213540 is a wasteful number, since it uses less digits than its factorization.

451242213540 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3822 (or 3820 counting only the distinct ones).

The product of its (nonzero) digits is 38400, while the sum is 33.

Adding to 451242213540 its reverse (45312242154), we get a palindrome (496554455694).

The spelling of 451242213540 in words is "four hundred fifty-one billion, two hundred forty-two million, two hundred thirteen thousand, five hundred forty".