25263887641 has 4 divisors (see below), whose sum is σ = 25321436800. Its totient is φ = 25206338484.

The previous prime is 25263887639. The next prime is 25263887659. The reversal of 25263887641 is 14678836252.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 25263887641 - 2¹ = 25263887639 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (25263887141) by changing a digit.

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 in 3 ways as a sum of consecutive naturals, for example, 28773921 + ... + 28774798.

It is an arithmetic number, because the mean of its divisors is an integer number (6330359200).

Almost surely, 2^25263887641 is an apocalyptic number.

It is an amenable number.

25263887641 is a deficient number, since it is larger than the sum of its proper divisors (57549159).

25263887641 is an equidigital number, since it uses as much as digits as its factorization.

25263887641 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 57549158.

The product of its digits is 3870720, while the sum is 52.

The spelling of 25263887641 in words is "twenty-five billion, two hundred sixty-three million, eight hundred eighty-seven thousand, six hundred forty-one".