25801051357439 has 16 divisors (see below), whose sum is σ = 26946485200800. Its totient is φ = 24682080224256.

The previous prime is 25801051357429. The next prime is 25801051357481. The reversal of 25801051357439 is 93475315010852.

It is a cyclic number.

It is not a de Polignac number, because 25801051357439 - 2¹⁶ = 25801051291903 is a prime.

It is a super-2 number, since 2×25801051357439² (a number of 28 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (53).

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (25801051357429) 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 15 ways as a sum of consecutive naturals, for example, 8651594 + ... + 11245095.

It is an arithmetic number, because the mean of its divisors is an integer number (1684155325050).

Almost surely, 2^{25801051357439} is an apocalyptic number.

25801051357439 is a deficient number, since it is larger than the sum of its proper divisors (1145433843361).

25801051357439 is a wasteful number, since it uses less digits than its factorization.

25801051357439 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 19897354.

The product of its (nonzero) digits is 4536000, while the sum is 53.

The spelling of 25801051357439 in words is "twenty-five trillion, eight hundred one billion, fifty-one million, three hundred fifty-seven thousand, four hundred thirty-nine".