545815780 has 24 divisors (see below), whose sum is σ = 1174171320. Its totient is φ = 213000960.

The previous prime is 545815771. The next prime is 545815789. The reversal of 545815780 is 87518545.

It is an interprime number because it is at equal distance from previous prime (545815771) and next prime (545815789).

It can be written as a sum of positive squares in 4 ways, for example, as 52620516 + 493195264 = 7254^2 + 22208^2 .

It is not an unprimeable number, because it can be changed into a prime (545815789) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 331995 + ... + 333634.

It is an arithmetic number, because the mean of its divisors is an integer number (48923805).

Almost surely, 2^545815780 is an apocalyptic number.

It is an amenable number.

545815780 is an abundant number, since it is smaller than the sum of its proper divisors (628355540).

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

545815780 is a wasteful number, since it uses less digits than its factorization.

545815780 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 665679 (or 665677 counting only the distinct ones).

The product of its (nonzero) digits is 224000, while the sum is 43.

The square root of 545815780 is about 23362.7006144410. The cubic root of 545815780 is about 817.2382700124.

The spelling of 545815780 in words is "five hundred forty-five million, eight hundred fifteen thousand, seven hundred eighty".