25157947569 has 32 divisors (see below), whose sum is σ = 34358246400. Its totient is φ = 16369335360.

The previous prime is 25157947567. The next prime is 25157947583. The reversal of 25157947569 is 96574975152.

It is a happy number.

It is not a de Polignac number, because 25157947569 - 2¹ = 25157947567 is a prime.

It is a super-2 number, since 2×25157947569² (a number of 22 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (25157947567) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 27374892 + ... + 27375810.

It is an arithmetic number, because the mean of its divisors is an integer number (1073695200).

Almost surely, 2^25157947569 is an apocalyptic number.

It is an amenable number.

25157947569 is a deficient number, since it is larger than the sum of its proper divisors (9200298831).

25157947569 is a wasteful number, since it uses less digits than its factorization.

25157947569 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1925.

The product of its digits is 23814000, while the sum is 60.

The spelling of 25157947569 in words is "twenty-five billion, one hundred fifty-seven million, nine hundred forty-seven thousand, five hundred sixty-nine".