545672780 has 48 divisors (see below), whose sum is σ = 1209569760. Its totient is φ = 206208000.

The previous prime is 545672779. The next prime is 545672807. The reversal of 545672780 is 87276545.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 150590 + ... + 154170.

It is an arithmetic number, because the mean of its divisors is an integer number (25199370).

Almost surely, 2^545672780 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 545672780, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (604784880).

545672780 is an abundant number, since it is smaller than the sum of its proper divisors (663896980).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

545672780 is a wasteful number, since it uses less digits than its factorization.

545672780 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4010 (or 4008 counting only the distinct ones).

The product of its (nonzero) digits is 470400, while the sum is 44.

The square root of 545672780 is about 23359.6399801024. The cubic root of 545672780 is about 817.1668935002.

The spelling of 545672780 in words is "five hundred forty-five million, six hundred seventy-two thousand, seven hundred eighty".