2505759994 has 4 divisors (see below), whose sum is σ = 3758639994. Its totient is φ = 1252879996.

The previous prime is 2505759989. The next prime is 2505760079. The reversal of 2505759994 is 4999575052.

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., 2029953025 + 475806969 = 45055^2 + 21813^2 .

It is an unprimeable number.

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 as a sum of consecutive naturals, namely, 626439997 + ... + 626440000.

Almost surely, 2^2505759994 is an apocalyptic number.

2505759994 is a deficient number, since it is larger than the sum of its proper divisors (1252880000).

2505759994 is a wasteful number, since it uses less digits than its factorization.

2505759994 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1252879999.

The product of its (nonzero) digits is 5103000, while the sum is 55.

The square root of 2505759994 is about 50057.5668006346. The cubic root of 2505759994 is about 1358.2503440869.

The spelling of 2505759994 in words is "two billion, five hundred five million, seven hundred fifty-nine thousand, nine hundred ninety-four".