745685906280 has 384 divisors, whose sum is σ = 2875175066880. Its totient is φ = 153441361920.

The previous prime is 745685906261. The next prime is 745685906311. The reversal of 745685906280 is 82609586547.

It is a Harshad number since it is a multiple of its sum of digits (60).

It is an unprimeable number.

It is a polite number, since it can be written in 95 ways as a sum of consecutive naturals, for example, 2136910 + ... + 2461250.

It is an arithmetic number, because the mean of its divisors is an integer number (7487435070).

Almost surely, 2^745685906280 is an apocalyptic number.

745685906280 is a gapful number since it is divisible by the number (70) 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 745685906280, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1437587533440).

745685906280 is an abundant number, since it is smaller than the sum of its proper divisors (2129489160600).

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

745685906280 is a wasteful number, since it uses less digits than its factorization.

745685906280 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 324409 (or 324398 counting only the distinct ones).

The product of its (nonzero) digits is 29030400, while the sum is 60.

The spelling of 745685906280 in words is "seven hundred forty-five billion, six hundred eighty-five million, nine hundred six thousand, two hundred eighty".