25012765145 has 32 divisors (see below), whose sum is σ = 31012826400. Its totient is φ = 19357138944.

The previous prime is 25012765139. The next prime is 25012765153. The reversal of 25012765145 is 54156721052.

It can be written as a sum of positive squares in 16 ways, for example, as 1180815769 + 23831949376 = 34363^2 + 154376^2 .

It is a cyclic number.

It is not a de Polignac number, because 25012765145 - 2¹⁶ = 25012699609 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 25012765099 and 25012765108.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 9644969 + ... + 9647561.

It is an arithmetic number, because the mean of its divisors is an integer number (969150825).

Almost surely, 2^25012765145 is an apocalyptic number.

It is an amenable number.

25012765145 is a deficient number, since it is larger than the sum of its proper divisors (6000061255).

25012765145 is a wasteful number, since it uses less digits than its factorization.

25012765145 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3149.

The product of its (nonzero) digits is 84000, while the sum is 38.

The spelling of 25012765145 in words is "twenty-five billion, twelve million, seven hundred sixty-five thousand, one hundred forty-five".