745215552 has 140 divisors (see below), whose sum is σ = 2285687580. Its totient is φ = 239791104.

The previous prime is 745215539. The next prime is 745215613. The reversal of 745215552 is 255512547.

745215552 is a `hidden beast` number, since 7 + 452 + 155 + 52 = 666.

It can be written as a sum of positive squares in 2 ways, for example, as 520934976 + 224280576 = 22824^2 + 14976^2 .

It is a Harshad number since it is a multiple of its sum of digits (36).

It is an unprimeable number.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 147858 + ... + 152814.

Almost surely, 2^745215552 is an apocalyptic number.

745215552 is a gapful number since it is divisible by the number (72) 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 745215552, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1142843790).

745215552 is an abundant number, since it is smaller than the sum of its proper divisors (1540472028).

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

745215552 is a wasteful number, since it uses less digits than its factorization.

745215552 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5010 (or 4991 counting only the distinct ones).

The product of its digits is 70000, while the sum is 36.

The square root of 745215552 is about 27298.6364494639. The cubic root of 745215552 is about 906.6241915896.

The spelling of 745215552 in words is "seven hundred forty-five million, two hundred fifteen thousand, five hundred fifty-two".