25306950513 has 16 divisors (see below), whose sum is σ = 36342423936. Its totient is φ = 15571691520.

The previous prime is 25306950481. The next prime is 25306950563. The reversal of 25306950513 is 31505960352.

It is not a de Polignac number, because 25306950513 - 2⁵ = 25306950481 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (39).

It is not an unprimeable number, because it can be changed into a prime (25306950563) 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 15 ways as a sum of consecutive naturals, for example, 351508 + ... + 417338.

It is an arithmetic number, because the mean of its divisors is an integer number (2271401496).

Almost surely, 2^25306950513 is an apocalyptic number.

It is an amenable number.

25306950513 is a deficient number, since it is larger than the sum of its proper divisors (11035473423).

25306950513 is a wasteful number, since it uses less digits than its factorization.

25306950513 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 75704.

The product of its (nonzero) digits is 121500, while the sum is 39.

The spelling of 25306950513 in words is "twenty-five billion, three hundred six million, nine hundred fifty thousand, five hundred thirteen".