2505277780 has 24 divisors (see below), whose sum is σ = 5264444808. Its totient is φ = 1001470848.

The previous prime is 2505277769. The next prime is 2505277787. The reversal of 2505277780 is 877725052.

It can be written as a sum of positive squares in 4 ways, for example, as 75076 + 2505202704 = 274^2 + 50052^2 .

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2505277787) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 7279 + ... + 71158.

It is an arithmetic number, because the mean of its divisors is an integer number (219351867).

Almost surely, 2^2505277780 is an apocalyptic number.

2505277780 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

2505277780 is an abundant number, since it is smaller than the sum of its proper divisors (2759167028).

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

2505277780 is a wasteful number, since it uses less digits than its factorization.

2505277780 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 80043 (or 80041 counting only the distinct ones).

The product of its (nonzero) digits is 274400, while the sum is 43.

The square root of 2505277780 is about 50052.7499744020. The cubic root of 2505277780 is about 1358.1632102630.

The spelling of 2505277780 in words is "two billion, five hundred five million, two hundred seventy-seven thousand, seven hundred eighty".