25201251545 has 16 divisors (see below), whose sum is σ = 30409910400. Its totient is φ = 20048840064.

The previous prime is 25201251533. The next prime is 25201251553. The reversal of 25201251545 is 54515210252.

It is a happy number.

It is a cyclic number.

It is not a de Polignac number, because 25201251545 - 2³² = 20906284249 is a prime.

It is an unprimeable number.

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 15 ways as a sum of consecutive naturals, for example, 2186237 + ... + 2197733.

It is an arithmetic number, because the mean of its divisors is an integer number (1900619400).

Almost surely, 2^25201251545 is an apocalyptic number.

It is an amenable number.

25201251545 is a deficient number, since it is larger than the sum of its proper divisors (5208658855).

25201251545 is a wasteful number, since it uses less digits than its factorization.

25201251545 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13904.

The product of its (nonzero) digits is 20000, while the sum is 32.

Adding to 25201251545 its reverse (54515210252), we get a palindrome (79716461797).

The spelling of 25201251545 in words is "twenty-five billion, two hundred one million, two hundred fifty-one thousand, five hundred forty-five".