25012123145 has 16 divisors (see below), whose sum is σ = 32399516160. Its totient is φ = 18479719104.

The previous prime is 25012123109. The next prime is 25012123153. The reversal of 25012123145 is 54132121052.

It is not a de Polignac number, because 25012123145 - 2¹² = 25012119049 is a prime.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 3746609 + ... + 3753278.

It is an arithmetic number, because the mean of its divisors is an integer number (2024969760).

Almost surely, 2^25012123145 is an apocalyptic number.

It is an amenable number.

25012123145 is a deficient number, since it is larger than the sum of its proper divisors (7387393015).

25012123145 is a wasteful number, since it uses less digits than its factorization.

25012123145 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7499944.

The product of its (nonzero) digits is 2400, while the sum is 26.

Adding to 25012123145 its reverse (54132121052), we get a palindrome (79144244197).

The spelling of 25012123145 in words is "twenty-five billion, twelve million, one hundred twenty-three thousand, one hundred forty-five".