25389100605081 has 16 divisors (see below), whose sum is σ = 35637907408640. Its totient is φ = 16033384535760.

The previous prime is 25389100605053. The next prime is 25389100605091. The reversal of 25389100605081 is 18050600198352.

It is a happy number.

It is not a de Polignac number, because 25389100605081 - 2⁶ = 25389100605017 is a prime.

It is a super-2 number, since 2×25389100605081² (a number of 28 digits) contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 25389100605081.

It is not an unprimeable number, because it can be changed into a prime (25389100605091) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 25010455 + ... + 26005788.

It is an arithmetic number, because the mean of its divisors is an integer number (2227369213040).

Almost surely, 2^{25389100605081} is an apocalyptic number.

It is an amenable number.

25389100605081 is a deficient number, since it is larger than the sum of its proper divisors (10248806803559).

25389100605081 is a wasteful number, since it uses less digits than its factorization.

25389100605081 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 51024996.

The product of its (nonzero) digits is 518400, while the sum is 48.

The spelling of 25389100605081 in words is "twenty-five trillion, three hundred eighty-nine billion, one hundred million, six hundred five thousand, eighty-one".