25263887775 has 48 divisors (see below), whose sum is σ = 47755276800. Its totient is φ = 11544716160.

The previous prime is 25263887773. The next prime is 25263887777. The reversal of 25263887775 is 57778836252.

It is an interprime number because it is at equal distance from previous prime (25263887773) and next prime (25263887777).

It is not a de Polignac number, because 25263887775 - 2¹ = 25263887773 is a prime.

It is a super-3 number, since 3×25263887775³ (a number of 32 digits) contains 333 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (25263887773) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 1608661 + ... + 1624289.

It is an arithmetic number, because the mean of its divisors is an integer number (994901600).

Almost surely, 2^25263887775 is an apocalyptic number.

25263887775 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

25263887775 is a deficient number, since it is larger than the sum of its proper divisors (22491389025).

25263887775 is a wasteful number, since it uses less digits than its factorization.

25263887775 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 18728 (or 18723 counting only the distinct ones).

The product of its digits is 39513600, while the sum is 60.

The spelling of 25263887775 in words is "twenty-five billion, two hundred sixty-three million, eight hundred eighty-seven thousand, seven hundred seventy-five".