25959429978 has 16 divisors (see below), whose sum is σ = 51921720576. Its totient is φ = 8652666560.

The previous prime is 25959429973. The next prime is 25959429983. The reversal of 25959429978 is 87992495952.

It is an interprime number because it is at equal distance from previous prime (25959429973) and next prime (25959429983).

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (25959429973) 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 7 ways as a sum of consecutive naturals, for example, 9463 + ... + 228053.

It is an arithmetic number, because the mean of its divisors is an integer number (3245107536).

Almost surely, 2^25959429978 is an apocalyptic number.

25959429978 is an abundant number, since it is smaller than the sum of its proper divisors (25962290598).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

25959429978 is a wasteful number, since it uses less digits than its factorization.

25959429978 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 238389.

The product of its digits is 146966400, while the sum is 69.

The spelling of 25959429978 in words is "twenty-five billion, nine hundred fifty-nine million, four hundred twenty-nine thousand, nine hundred seventy-eight".