2491572625 has 8 divisors (see below), whose sum is σ = 3109482792. Its totient is φ = 1993258000.

The previous prime is 2491572623. The next prime is 2491572659. The reversal of 2491572625 is 5262751942.

It can be written as a sum of positive squares in 4 ways, for example, as 266375041 + 2225197584 = 16321^2 + 47172^2 .

It is not a de Polignac number, because 2491572625 - 2¹ = 2491572623 is a prime.

It is a hoax number, since the sum of its digits (43) coincides with the sum of the digits of its distinct prime factors.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (2491572623) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 9966166 + ... + 9966415.

It is an arithmetic number, because the mean of its divisors is an integer number (388685349).

Almost surely, 2^2491572625 is an apocalyptic number.

2491572625 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

It is an amenable number.

2491572625 is a deficient number, since it is larger than the sum of its proper divisors (617910167).

2491572625 is an equidigital number, since it uses as much as digits as its factorization.

2491572625 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 19932596 (or 19932586 counting only the distinct ones).

The product of its digits is 302400, while the sum is 43.

The square root of 2491572625 is about 49915.6551093943. The cubic root of 2491572625 is about 1355.6820638063.

The spelling of 2491572625 in words is "two billion, four hundred ninety-one million, five hundred seventy-two thousand, six hundred twenty-five".