25861307514 has 64 divisors (see below), whose sum is σ = 61340544000. Its totient is φ = 7263674544.

The previous prime is 25861307513. The next prime is 25861307533. The reversal of 25861307514 is 41570316852.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (42).

It is not an unprimeable number, because it can be changed into a prime (25861307513) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 14929 + ... + 227915.

It is an arithmetic number, because the mean of its divisors is an integer number (958446000).

Almost surely, 2^25861307514 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 25861307514, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (30670272000).

25861307514 is an abundant number, since it is smaller than the sum of its proper divisors (35479236486).

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

25861307514 is a wasteful number, since it uses less digits than its factorization.

25861307514 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 213072 (or 213058 counting only the distinct ones).

The product of its (nonzero) digits is 201600, while the sum is 42.

The spelling of 25861307514 in words is "twenty-five billion, eight hundred sixty-one million, three hundred seven thousand, five hundred fourteen".