545877778545 has 96 divisors (see below), whose sum is σ = 1037975178240. Its totient is φ = 263191265280.

The previous prime is 545877778489. The next prime is 545877778547.

545877778545 is a `hidden beast` number, since 5 + 4 + 5 + 8 + 7 + 7 + 7 + 78 + 545 = 666.

545877778545 is nontrivially palindromic in base 10.

It is not a de Polignac number, because 545877778545 - 2²² = 545873584241 is a prime.

It is not an unprimeable number, because it can be changed into a prime (545877778547) by changing a digit.

It is a polite number, since it can be written in 95 ways as a sum of consecutive naturals, for example, 127271761 + ... + 127276049.

It is an arithmetic number, because the mean of its divisors is an integer number (10812241440).

Almost surely, 2^545877778545 is an apocalyptic number.

545877778545 is a gapful number since it is divisible by the number (55) formed by its first and last digit.

It is an amenable number.

545877778545 is a deficient number, since it is larger than the sum of its proper divisors (492097399695).

545877778545 is a wasteful number, since it uses less digits than its factorization.

545877778545 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5687 (or 5684 counting only the distinct ones).

The product of its digits is 1536640000, while the sum is 72.

The spelling of 545877778545 in words is "five hundred forty-five billion, eight hundred seventy-seven million, seven hundred seventy-eight thousand, five hundred forty-five".