25429405157 has 12 divisors (see below), whose sum is σ = 27550816164. Its totient is φ = 23460652800.

The previous prime is 25429405087. The next prime is 25429405159. The reversal of 25429405157 is 75150492452.

It is a Cunningham number, because it is equal to 159466²+1.

It can be written as a sum of positive squares in 6 ways, for example, as 5595189601 + 19834215556 = 74801^2 + 140834^2 .

It is not a de Polignac number, because 25429405157 - 2¹² = 25429401061 is a prime.

It is a Smith number, since the sum of its digits (44) coincides with the sum of the digits of its prime factors.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (25429405159) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 281693 + ... + 360845.

It is an arithmetic number, because the mean of its divisors is an integer number (2295901347).

Almost surely, 2^25429405157 is an apocalyptic number.

It is an amenable number.

25429405157 is a deficient number, since it is larger than the sum of its proper divisors (2121411007).

25429405157 is a wasteful number, since it uses less digits than its factorization.

25429405157 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 81080 (or 81067 counting only the distinct ones).

The product of its (nonzero) digits is 504000, while the sum is 44.

The spelling of 25429405157 in words is "twenty-five billion, four hundred twenty-nine million, four hundred five thousand, one hundred fifty-seven".