25401590051 has 4 divisors (see below), whose sum is σ = 25749557112. Its totient is φ = 25053622992.

The previous prime is 25401590033. The next prime is 25401590059. The reversal of 25401590051 is 15009510452.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-25401590051 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (25401590059) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 173983421 + ... + 173983566.

It is an arithmetic number, because the mean of its divisors is an integer number (6437389278).

Almost surely, 2^25401590051 is an apocalyptic number.

25401590051 is a deficient number, since it is larger than the sum of its proper divisors (347967061).

25401590051 is an equidigital number, since it uses as much as digits as its factorization.

25401590051 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 347967060.

The product of its (nonzero) digits is 9000, while the sum is 32.

The spelling of 25401590051 in words is "twenty-five billion, four hundred one million, five hundred ninety thousand, fifty-one".