25757550001 has 4 divisors (see below), whose sum is σ = 25757877604. Its totient is φ = 25757222400.

The previous prime is 25757549953. The next prime is 25757550029. The reversal of 25757550001 is 10005575752.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It can be written as a sum of positive squares in 2 ways, for example, as 5628750625 + 20128799376 = 75025^2 + 141876^2 .

It is a 3-Lehmer number, since φ(25757550001) divides (25757550001-1)³.

It is a cyclic number.

It is not a de Polignac number, because 25757550001 - 2²⁵ = 25723995569 is a prime.

It is a deceptive number, since it divides R_25757550000.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (25757550061) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 32761 + ... + 229321.

It is an arithmetic number, because the mean of its divisors is an integer number (6439469401).

It is a Poulet number, since it divides 2^25757550000-1.

Almost surely, 2^25757550001 is an apocalyptic number.

25757550001 is the 131041-st pentagonal number.

It is an amenable number.

25757550001 is a deficient number, since it is larger than the sum of its proper divisors (327603).

25757550001 is a wasteful number, since it uses less digits than its factorization.

25757550001 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 327602.

The product of its (nonzero) digits is 61250, while the sum is 37.

The spelling of 25757550001 in words is "twenty-five billion, seven hundred fifty-seven million, five hundred fifty thousand, one".