2505758578 has 4 divisors (see below), whose sum is σ = 3758637870. Its totient is φ = 1252879288.

The previous prime is 2505758531. The next prime is 2505758579. The reversal of 2505758578 is 8758575052.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 1745819089 + 759939489 = 41783^2 + 27567^2 .

It is not an unprimeable number, because it can be changed into a prime (2505758579) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 626439643 + ... + 626439646.

Almost surely, 2^2505758578 is an apocalyptic number.

2505758578 is a deficient number, since it is larger than the sum of its proper divisors (1252879292).

2505758578 is a wasteful number, since it uses less digits than its factorization.

2505758578 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1252879291.

The product of its (nonzero) digits is 3920000, while the sum is 52.

The square root of 2505758578 is about 50057.5526569168. The cubic root of 2505758578 is about 1358.2500882386.

The spelling of 2505758578 in words is "two billion, five hundred five million, seven hundred fifty-eight thousand, five hundred seventy-eight".