25220742451 has 4 divisors (see below), whose sum is σ = 25226881504. Its totient is φ = 25214603400.

The previous prime is 25220742433. The next prime is 25220742457. The reversal of 25220742451 is 15424702252.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 25220742451 - 2²⁹ = 24683871539 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (25220742457) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3063360 + ... + 3071581.

It is an arithmetic number, because the mean of its divisors is an integer number (6306720376).

Almost surely, 2^25220742451 is an apocalyptic number.

25220742451 is a deficient number, since it is larger than the sum of its proper divisors (6139053).

25220742451 is an equidigital number, since it uses as much as digits as its factorization.

25220742451 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6139052.

The product of its (nonzero) digits is 44800, while the sum is 34.

The spelling of 25220742451 in words is "twenty-five billion, two hundred twenty million, seven hundred forty-two thousand, four hundred fifty-one".