745745821272 has 96 divisors (see below), whose sum is σ = 2024148625200. Its totient is φ = 248038382592.

The previous prime is 745745821253. The next prime is 745745821277. The reversal of 745745821272 is 272128547547.

745745821272 is a `hidden beast` number, since 7 + 4 + 57 + 4 + 582 + 1 + 2 + 7 + 2 = 666.

745745821272 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a super-2 number, since 2×745745821272² (a number of 25 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (745745821277) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 103904148 + ... + 103911324.

Almost surely, 2^745745821272 is an apocalyptic number.

745745821272 is a gapful number since it is divisible by the number (72) formed by its first and last digit.

It is an amenable number.

745745821272 is an abundant number, since it is smaller than the sum of its proper divisors (1278402803928).

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

745745821272 is a wasteful number, since it uses less digits than its factorization.

745745821272 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10145 (or 10138 counting only the distinct ones).

The product of its digits is 8780800, while the sum is 54.

The spelling of 745745821272 in words is "seven hundred forty-five billion, seven hundred forty-five million, eight hundred twenty-one thousand, two hundred seventy-two".