745138655 has 8 divisors (see below), whose sum is σ = 895050000. Its totient is φ = 595521856.

The previous prime is 745138651. The next prime is 745138697. The reversal of 745138655 is 556831547.

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 745138655 - 2² = 745138651 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (745138651) by changing a digit.

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 7 ways as a sum of consecutive naturals, for example, 68030 + ... + 78219.

It is an arithmetic number, because the mean of its divisors is an integer number (111881250).

Almost surely, 2^745138655 is an apocalyptic number.

745138655 is a deficient number, since it is larger than the sum of its proper divisors (149911345).

745138655 is a wasteful number, since it uses less digits than its factorization.

745138655 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 147273.

The product of its digits is 504000, while the sum is 44.

The square root of 745138655 is about 27297.2279728180. The cubic root of 745138655 is about 906.5930063938.

The spelling of 745138655 in words is "seven hundred forty-five million, one hundred thirty-eight thousand, six hundred fifty-five".