25142629957 has 4 divisors (see below), whose sum is σ = 25755864876. Its totient is φ = 24529395040.

The previous prime is 25142629907. The next prime is 25142629969. The reversal of 25142629957 is 75992624152.

It is a happy number.

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 2548331361 + 22594298596 = 50481^2 + 150314^2 .

It is a cyclic number.

It is not a de Polignac number, because 25142629957 - 2¹⁵ = 25142597189 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 (25142629907) 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, 306617398 + ... + 306617479.

It is an arithmetic number, because the mean of its divisors is an integer number (6438966219).

Almost surely, 2^25142629957 is an apocalyptic number.

It is an amenable number.

25142629957 is a deficient number, since it is larger than the sum of its proper divisors (613234919).

25142629957 is an equidigital number, since it uses as much as digits as its factorization.

25142629957 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 613234918.

The product of its digits is 2721600, while the sum is 52.

The spelling of 25142629957 in words is "twenty-five billion, one hundred forty-two million, six hundred twenty-nine thousand, nine hundred fifty-seven".