25456535470081 has 16 divisors (see below), whose sum is σ = 26295342796800. Its totient is φ = 24618834213840.

The previous prime is 25456535470039. The next prime is 25456535470109. The reversal of 25456535470081 is 18007453565452.

It is a cyclic number.

It is not a de Polignac number, because 25456535470081 - 2¹⁷ = 25456535339009 is a prime.

It is a super-2 number, since 2×25456535470081² (a number of 28 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (25456535440081) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 406447290 + ... + 406509916.

It is an arithmetic number, because the mean of its divisors is an integer number (1643458924800).

Almost surely, 2^{25456535470081} is an apocalyptic number.

It is an amenable number.

25456535470081 is a deficient number, since it is larger than the sum of its proper divisors (838807326719).

25456535470081 is a wasteful number, since it uses less digits than its factorization.

25456535470081 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 71244.

The product of its (nonzero) digits is 20160000, while the sum is 55.

The spelling of 25456535470081 in words is "twenty-five trillion, four hundred fifty-six billion, five hundred thirty-five million, four hundred seventy thousand, eighty-one".