25135521256601 has 8 divisors (see below), whose sum is σ = 29975280008064. Its totient is φ = 20608005005280.

The previous prime is 25135521256577. The next prime is 25135521256669. The reversal of 25135521256601 is 10665212553152.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 25135521256601 - 2³⁰ = 25134447514777 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (25135521256801) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 78060624860 + ... + 78060625181.

It is an arithmetic number, because the mean of its divisors is an integer number (3746910001008).

Almost surely, 2^{25135521256601} is an apocalyptic number.

It is an amenable number.

25135521256601 is a deficient number, since it is larger than the sum of its proper divisors (4839758751463).

25135521256601 is a wasteful number, since it uses less digits than its factorization.

25135521256601 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 156121250071.

The product of its (nonzero) digits is 540000, while the sum is 44.

The spelling of 25135521256601 in words is "twenty-five trillion, one hundred thirty-five billion, five hundred twenty-one million, two hundred fifty-six thousand, six hundred one".