25051226149 has 4 divisors (see below), whose sum is σ = 25060462636. Its totient is φ = 25041989664.

The previous prime is 25051226119. The next prime is 25051226173. The reversal of 25051226149 is 94162215052.

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

It can be written as a sum of positive squares in 2 ways, for example, as 24843433924 + 207792225 = 157618^2 + 14415^2 .

It is a cyclic number.

It is not a de Polignac number, because 25051226149 - 2⁷ = 25051226021 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (25051226119) 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, 4614174 + ... + 4619599.

It is an arithmetic number, because the mean of its divisors is an integer number (6265115659).

Almost surely, 2^25051226149 is an apocalyptic number.

It is an amenable number.

25051226149 is a deficient number, since it is larger than the sum of its proper divisors (9236487).

25051226149 is an equidigital number, since it uses as much as digits as its factorization.

25051226149 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9236486.

The product of its (nonzero) digits is 43200, while the sum is 37.

The spelling of 25051226149 in words is "twenty-five billion, fifty-one million, two hundred twenty-six thousand, one hundred forty-nine".