745477774547 has 4 divisors (see below), whose sum is σ = 813248481336. Its totient is φ = 677707067760.

The previous prime is 745477774543. The next prime is 745477774579.

745477774547 is nontrivially palindromic in base 10.

745477774547 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 745477774547 - 2² = 745477774543 is a prime.

It is a super-2 number, since 2×745477774547² (a number of 25 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (745477774541) 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, 33885353378 + ... + 33885353399.

It is an arithmetic number, because the mean of its divisors is an integer number (203312120334).

Almost surely, 2^745477774547 is an apocalyptic number.

745477774547 is a deficient number, since it is larger than the sum of its proper divisors (67770706789).

745477774547 is a wasteful number, since it uses less digits than its factorization.

745477774547 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 67770706788.

The product of its digits is 752953600, while the sum is 68.

The spelling of 745477774547 in words is "seven hundred forty-five billion, four hundred seventy-seven million, seven hundred seventy-four thousand, five hundred forty-seven".