945877778549 has 4 divisors (see below), whose sum is σ = 1031866667520. Its totient is φ = 859888889580.

The previous prime is 945877778501. The next prime is 945877778557.

945877778549 is nontrivially palindromic in base 10.

945877778549 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, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 945877778549 - 2¹² = 945877774453 is a prime.

It is a super-3 number, since 3×945877778549³ (a number of 37 digits) contains 333 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (945877778149) 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, 42994444469 + ... + 42994444490.

It is an arithmetic number, because the mean of its divisors is an integer number (257966666880).

Almost surely, 2^945877778549 is an apocalyptic number.

It is an amenable number.

945877778549 is a deficient number, since it is larger than the sum of its proper divisors (85988888971).

945877778549 is a wasteful number, since it uses less digits than its factorization.

945877778549 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 85988888970.

The product of its digits is 4978713600, while the sum is 80.

The spelling of 945877778549 in words is "nine hundred forty-five billion, eight hundred seventy-seven million, seven hundred seventy-eight thousand, five hundred forty-nine".