745370553 has 4 divisors (see below), whose sum is σ = 993827408. Its totient is φ = 496913700.

The previous prime is 745370543. The next prime is 745370569. The reversal of 745370553 is 355073547.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 355073547 = 3 ⋅118357849.

It is not a de Polignac number, because 745370553 - 2¹⁰ = 745369529 is a prime.

It is a super-2 number, since 2×745370553² = 1111154522559051618, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (745370503) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 124228423 + ... + 124228428.

It is an arithmetic number, because the mean of its divisors is an integer number (248456852).

Almost surely, 2^745370553 is an apocalyptic number.

It is an amenable number.

745370553 is a deficient number, since it is larger than the sum of its proper divisors (248456855).

745370553 is a wasteful number, since it uses less digits than its factorization.

745370553 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 248456854.

The product of its (nonzero) digits is 220500, while the sum is 39.

The square root of 745370553 is about 27301.4752898081. The cubic root of 745370553 is about 906.6870449542.

The spelling of 745370553 in words is "seven hundred forty-five million, three hundred seventy thousand, five hundred fifty-three".