2528766538 has 4 divisors (see below), whose sum is σ = 3793149810. Its totient is φ = 1264383268.

The previous prime is 2528766437. The next prime is 2528766557. The reversal of 2528766538 is 8356678252.

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., 1625944329 + 902822209 = 40323^2 + 30047^2 .

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 632191633 + ... + 632191636.

Almost surely, 2^2528766538 is an apocalyptic number.

2528766538 is a deficient number, since it is larger than the sum of its proper divisors (1264383272).

2528766538 is a wasteful number, since it uses less digits than its factorization.

2528766538 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1264383271.

The product of its digits is 4838400, while the sum is 52.

The square root of 2528766538 is about 50286.8425932669. The cubic root of 2528766538 is about 1362.3945950836.

The spelling of 2528766538 in words is "two billion, five hundred twenty-eight million, seven hundred sixty-six thousand, five hundred thirty-eight".