2545767644 has 48 divisors (see below), whose sum is σ = 5176442880. Its totient is φ = 1072906560.

The previous prime is 2545767641. The next prime is 2545767677. The reversal of 2545767644 is 4467675452.

It is a super-5 number, since 5×2545767644⁵ (a number of 48 digits) contains 55555 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 2545767592 and 2545767601.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2545767641) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1989797 + ... + 1991075.

It is an arithmetic number, because the mean of its divisors is an integer number (107842560).

Almost surely, 2^2545767644 is an apocalyptic number.

It is an amenable number.

2545767644 is an abundant number, since it is smaller than the sum of its proper divisors (2630675236).

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

2545767644 is a wasteful number, since it uses less digits than its factorization.

2545767644 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2418 (or 2416 counting only the distinct ones).

The product of its digits is 5644800, while the sum is 50.

The square root of 2545767644 is about 50455.6007198408. The cubic root of 2545767644 is about 1365.4409420447.

The spelling of 2545767644 in words is "two billion, five hundred forty-five million, seven hundred sixty-seven thousand, six hundred forty-four".