25651049557291 has 4 divisors (see below), whose sum is σ = 25651186667800. Its totient is φ = 25650912446784.

The previous prime is 25651049557261. The next prime is 25651049557327. The reversal of 25651049557291 is 19275594015652.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-25651049557291 is a prime.

It is a super-3 number, since 3×25651049557291³ (a number of 41 digits) contains 333 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (25651049557261) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 68274246 + ... + 68648923.

It is an arithmetic number, because the mean of its divisors is an integer number (6412796666950).

Almost surely, 2^{25651049557291} is an apocalyptic number.

25651049557291 is a deficient number, since it is larger than the sum of its proper divisors (137110509).

25651049557291 is a wasteful number, since it uses less digits than its factorization.

25651049557291 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 137110508.

The product of its (nonzero) digits is 34020000, while the sum is 61.

The spelling of 25651049557291 in words is "twenty-five trillion, six hundred fifty-one billion, forty-nine million, five hundred fifty-seven thousand, two hundred ninety-one".