2545561616 has 40 divisors (see below), whose sum is σ = 5542353600. Its totient is φ = 1123790976.

The previous prime is 2545561609. The next prime is 2545561637. The reversal of 2545561616 is 6161655452.

It is an unprimeable number.

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, 261266 + ... + 270833.

It is an arithmetic number, because the mean of its divisors is an integer number (138558840).

Almost surely, 2^2545561616 is an apocalyptic number.

2545561616 is a gapful number since it is divisible by the number (26) formed by its first and last digit.

It is an amenable number.

2545561616 is an abundant number, since it is smaller than the sum of its proper divisors (2996791984).

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

2545561616 is a wasteful number, since it uses less digits than its factorization.

2545561616 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 532143 (or 532137 counting only the distinct ones).

The product of its digits is 216000, while the sum is 41.

The square root of 2545561616 is about 50453.5590023142. The cubic root of 2545561616 is about 1365.4041061803.

The spelling of 2545561616 in words is "two billion, five hundred forty-five million, five hundred sixty-one thousand, six hundred sixteen".