745326817686 has 72 divisors (see below), whose sum is σ = 1780296539112. Its totient is φ = 225186192000.

The previous prime is 745326817637. The next prime is 745326817727. The reversal of 745326817686 is 686718623547.

745326817686 is a `hidden beast` number, since 7 + 4 + 532 + 6 + 8 + 17 + 6 + 86 = 666.

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 35 ways as a sum of consecutive naturals, for example, 226261 + ... + 1241711.

It is an arithmetic number, because the mean of its divisors is an integer number (24726340821).

Almost surely, 2^745326817686 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 745326817686, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (890148269556).

745326817686 is an abundant number, since it is smaller than the sum of its proper divisors (1034969721426).

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

745326817686 is a wasteful number, since it uses less digits than its factorization.

745326817686 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1015818 (or 1015804 counting only the distinct ones).

The product of its digits is 81285120, while the sum is 63.

The spelling of 745326817686 in words is "seven hundred forty-five billion, three hundred twenty-six million, eight hundred seventeen thousand, six hundred eighty-six".