25557068662993 has 24 divisors (see below), whose sum is σ = 31137569536320. Its totient is φ = 20875726761120.

The previous prime is 25557068662919. The next prime is 25557068663017. The reversal of 25557068662993 is 39926686075552.

It is not a de Polignac number, because 25557068662993 - 2⁹ = 25557068662481 is a prime.

It is a super-3 number, since 3×25557068662993³ (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 (25557068662913) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 41847543 + ... + 42453868.

It is an arithmetic number, because the mean of its divisors is an integer number (1297398730680).

Almost surely, 2^{25557068662993} is an apocalyptic number.

25557068662993 is a gapful number since it is divisible by the number (23) formed by its first and last digit.

It is an amenable number.

25557068662993 is a deficient number, since it is larger than the sum of its proper divisors (5580500873327).

25557068662993 is a wasteful number, since it uses less digits than its factorization.

25557068662993 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 84301717 (or 84301710 counting only the distinct ones).

The product of its (nonzero) digits is 1469664000, while the sum is 73.

The spelling of 25557068662993 in words is "twenty-five trillion, five hundred fifty-seven billion, sixty-eight million, six hundred sixty-two thousand, nine hundred ninety-three".