25263220851 has 24 divisors (see below), whose sum is σ = 39934340784. Its totient is φ = 15262724160.

The previous prime is 25263220823. The next prime is 25263220859. The reversal of 25263220851 is 15802236252.

It is a happy number.

25263220851 is a `hidden beast` number, since 2 + 526 + 32 + 20 + 85 + 1 = 666.

It is not a de Polignac number, because 25263220851 - 2¹¹ = 25263218803 is a prime.

It is not an unprimeable number, because it can be changed into a prime (25263220859) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 371116 + ... + 433881.

It is an arithmetic number, because the mean of its divisors is an integer number (1663930866).

Almost surely, 2^25263220851 is an apocalyptic number.

25263220851 is a deficient number, since it is larger than the sum of its proper divisors (14671119933).

25263220851 is a wasteful number, since it uses less digits than its factorization.

25263220851 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 805331 (or 805328 counting only the distinct ones).

The product of its (nonzero) digits is 57600, while the sum is 36.

The spelling of 25263220851 in words is "twenty-five billion, two hundred sixty-three million, two hundred twenty thousand, eight hundred fifty-one".