745636557 has 8 divisors (see below), whose sum is σ = 994878720. Its totient is φ = 496742720.

The previous prime is 745636547. The next prime is 745636561. The reversal of 745636557 is 755636547.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 745636557 - 2¹⁰ = 745635533 is a prime.

It is a super-3 number, since 3×745636557³ (a number of 28 digits) contains 333 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (745636547) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 82044 + ... + 90677.

It is an arithmetic number, because the mean of its divisors is an integer number (124359840).

Almost surely, 2^745636557 is an apocalyptic number.

It is an amenable number.

745636557 is a deficient number, since it is larger than the sum of its proper divisors (249242163).

745636557 is a wasteful number, since it uses less digits than its factorization.

745636557 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 174163.

The product of its digits is 2646000, while the sum is 48.

The square root of 745636557 is about 27306.3464601180. The cubic root of 745636557 is about 906.7948900588.

The spelling of 745636557 in words is "seven hundred forty-five million, six hundred thirty-six thousand, five hundred fifty-seven".