25401817656383 has 12 divisors (see below), whose sum is σ = 29550704721120. Its totient is φ = 21771769646592.

The previous prime is 25401817656379. The next prime is 25401817656401. The reversal of 25401817656383 is 38365671810452.

It is not a de Polignac number, because 25401817656383 - 2² = 25401817656379 is a prime.

It is a super-2 number, since 2×25401817656383² (a number of 28 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (25401817656343) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 13600898 + ... + 15355391.

It is an arithmetic number, because the mean of its divisors is an integer number (2462558726760).

Almost surely, 2^{25401817656383} is an apocalyptic number.

25401817656383 is a deficient number, since it is larger than the sum of its proper divisors (4148887064737).

25401817656383 is a wasteful number, since it uses less digits than its factorization.

25401817656383 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 28974206 (or 28974199 counting only the distinct ones).

The product of its (nonzero) digits is 29030400, while the sum is 59.

The spelling of 25401817656383 in words is "twenty-five trillion, four hundred one billion, eight hundred seventeen million, six hundred fifty-six thousand, three hundred eighty-three".