25081373641 has 3 divisors (see below), whose sum is σ = 25081532013. Its totient is φ = 25081215270.

The previous prime is 25081373591. The next prime is 25081373651. The reversal of 25081373641 is 14637318052.

The square root of 25081373641 is 158371.

It is a perfect power (a square), and thus also a powerful number.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It is a de Polignac number, because none of the positive numbers 2^k-25081373641 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 25081373594 and 25081373603.

It is not an unprimeable number, because it can be changed into a prime (25081373651) by changing a digit.

It is a polite number, since it can be written in 2 ways as a sum of consecutive naturals, for example, 79186 + ... + 237556.

It is an arithmetic number, because the mean of its divisors is an integer number (8360510671).

Almost surely, 2^25081373641 is an apocalyptic number.

25081373641 is the 158371-st square number.

25081373641 is the 79186-th centered octagonal number.

It is an amenable number.

25081373641 is a deficient number, since it is larger than the sum of its proper divisors (158372).

25081373641 is an frugal number, since it uses more digits than its factorization.

25081373641 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 316742 (or 158371 counting only the distinct ones).

The product of its (nonzero) digits is 120960, while the sum is 40.

The spelling of 25081373641 in words is "twenty-five billion, eighty-one million, three hundred seventy-three thousand, six hundred forty-one".