2581763764 has 6 divisors (see below), whose sum is σ = 4518086594. Its totient is φ = 1290881880.

The previous prime is 2581763759. The next prime is 2581763791. The reversal of 2581763764 is 4673671852.

2581763764 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in only one way, i.e., 2256250000 + 325513764 = 47500^2 + 18042^2 .

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 322720467 + ... + 322720474.

Almost surely, 2^2581763764 is an apocalyptic number.

It is an amenable number.

2581763764 is a deficient number, since it is larger than the sum of its proper divisors (1936322830).

2581763764 is a wasteful number, since it uses less digits than its factorization.

2581763764 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 645440945 (or 645440943 counting only the distinct ones).

The product of its digits is 1693440, while the sum is 49.

The square root of 2581763764 is about 50811.0594654353. The cubic root of 2581763764 is about 1371.8464392219.

The spelling of 2581763764 in words is "two billion, five hundred eighty-one million, seven hundred sixty-three thousand, seven hundred sixty-four".