745891322500 has 135 divisors (see below), whose sum is σ = 1707390072003. Its totient is φ = 285004500000.

The previous prime is 745891322479. The next prime is 745891322543. The reversal of 745891322500 is 5223198547.

The square root of 745891322500 is 863650.

It is a perfect power (a square), and thus also a powerful number.

It can be written as a sum of positive squares in 2 ways, for example, as 58477879684 + 687413442816 = 241822^2 + 829104^2 .

It is a Harshad number since it is a multiple of its sum of digits (46).

It is a Duffinian 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 44 ways as a sum of consecutive naturals, for example, 993197125 + ... + 993197875.

Almost surely, 2^745891322500 is an apocalyptic number.

745891322500 is the 863650-th square number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 745891322500

745891322500 is an abundant number, since it is smaller than the sum of its proper divisors (961498749503).

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

745891322500 is an frugal number, since it uses more digits than its factorization.

745891322500 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1572 (or 781 counting only the distinct ones).

The product of its (nonzero) digits is 604800, while the sum is 46.

The spelling of 745891322500 in words is "seven hundred forty-five billion, eight hundred ninety-one million, three hundred twenty-two thousand, five hundred".