745546868645547 has 4 divisors (see below), whose sum is σ = 994062491527400. Its totient is φ = 497031245763696.

The previous prime is 745546868645543. The next prime is 745546868645549.

745546868645547 is nontrivially palindromic in base 10.

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

It is not a de Polignac number, because 745546868645547 - 2² = 745546868645543 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 745546868645547.

It is not an unprimeable number, because it can be changed into a prime (745546868645543) 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, 124257811440922 + ... + 124257811440927.

It is an arithmetic number, because the mean of its divisors is an integer number (248515622881850).

Almost surely, 2^{745546868645547} is an apocalyptic number.

745546868645547 is a deficient number, since it is larger than the sum of its proper divisors (248515622881853).

745546868645547 is a wasteful number, since it uses less digits than its factorization.

745546868645547 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 248515622881852.

The product of its digits is 108380160000, while the sum is 84.

The spelling of 745546868645547 in words is "seven hundred forty-five trillion, five hundred forty-six billion, eight hundred sixty-eight million, six hundred forty-five thousand, five hundred forty-seven".