25040646145 has 8 divisors (see below), whose sum is σ = 31816350504. Its totient is φ = 18854133504.

The previous prime is 25040646133. The next prime is 25040646167. The reversal of 25040646145 is 54164604052.

It can be written as a sum of positive squares in 4 ways, for example, as 9171701361 + 15868944784 = 95769^2 + 125972^2 .

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

It is a cyclic number.

It is not a de Polignac number, because 25040646145 - 2⁹ = 25040645633 is a prime.

It is a super-2 number, since 2×25040646145² (a number of 22 digits) contains 22 as substring.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 147297834 + ... + 147298003.

It is an arithmetic number, because the mean of its divisors is an integer number (3977043813).

Almost surely, 2^25040646145 is an apocalyptic number.

It is an amenable number.

25040646145 is a deficient number, since it is larger than the sum of its proper divisors (6775704359).

25040646145 is a wasteful number, since it uses less digits than its factorization.

25040646145 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 294595859.

The product of its (nonzero) digits is 115200, while the sum is 37.

The spelling of 25040646145 in words is "twenty-five billion, forty million, six hundred forty-six thousand, one hundred forty-five".