25746447021 has 16 divisors (see below), whose sum is σ = 36169252800. Its totient is φ = 16245664128.

The previous prime is 25746446959. The next prime is 25746447029. The reversal of 25746447021 is 12074464752.

It is not a de Polignac number, because 25746447021 - 2¹⁰ = 25746445997 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (25746447029) 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 15 ways as a sum of consecutive naturals, for example, 150336 + ... + 272201.

It is an arithmetic number, because the mean of its divisors is an integer number (2260578300).

Almost surely, 2^25746447021 is an apocalyptic number.

It is an amenable number.

25746447021 is a deficient number, since it is larger than the sum of its proper divisors (10422805779).

25746447021 is a wasteful number, since it uses less digits than its factorization.

25746447021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 423628.

The product of its (nonzero) digits is 376320, while the sum is 42.

The spelling of 25746447021 in words is "twenty-five billion, seven hundred forty-six million, four hundred forty-seven thousand, twenty-one".