25526278947 has 32 divisors (see below), whose sum is σ = 38066898240. Its totient is φ = 15112120320.

The previous prime is 25526278937. The next prime is 25526278951. The reversal of 25526278947 is 74987262552.

It is not a de Polignac number, because 25526278947 - 2⁴ = 25526278931 is a prime.

It is not an unprimeable number, because it can be changed into a prime (25526278927) 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, 29047 + ... + 227807.

It is an arithmetic number, because the mean of its divisors is an integer number (1189590570).

Almost surely, 2^25526278947 is an apocalyptic number.

25526278947 is a deficient number, since it is larger than the sum of its proper divisors (12540619293).

25526278947 is a wasteful number, since it uses less digits than its factorization.

25526278947 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 198903.

The product of its digits is 16934400, while the sum is 57.

The spelling of 25526278947 in words is "twenty-five billion, five hundred twenty-six million, two hundred seventy-eight thousand, nine hundred forty-seven".