745387783547 has 4 divisors (see below), whose sum is σ = 813150309336. Its totient is φ = 677625257760.

The previous prime is 745387783513. The next prime is 745387783549.

745387783547 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 745387783547 - 2²⁸ = 745119348091 is a prime.

It is a super-2 number, since 2×745387783547² (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 (745387783549) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 33881262878 + ... + 33881262899.

It is an arithmetic number, because the mean of its divisors is an integer number (203287577334).

Almost surely, 2^745387783547 is an apocalyptic number.

745387783547 is a deficient number, since it is larger than the sum of its proper divisors (67762525789).

745387783547 is a wasteful number, since it uses less digits than its factorization.

745387783547 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 67762525788.

The product of its digits is 553190400, while the sum is 68.

The spelling of 745387783547 in words is "seven hundred forty-five billion, three hundred eighty-seven million, seven hundred eighty-three thousand, five hundred forty-seven".