25155020513 has 32 divisors (see below), whose sum is σ = 30759906816. Its totient is φ = 20080263168.

The previous prime is 25155020507. The next prime is 25155020519. The reversal of 25155020513 is 31502055152.

It is an interprime number because it is at equal distance from previous prime (25155020507) and next prime (25155020519).

It is not a de Polignac number, because 25155020513 - 2⁸ = 25155020257 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (25155020519) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 11065745 + ... + 11068017.

It is an arithmetic number, because the mean of its divisors is an integer number (961247088).

Almost surely, 2^25155020513 is an apocalyptic number.

It is an amenable number.

25155020513 is a deficient number, since it is larger than the sum of its proper divisors (5604886303).

25155020513 is a wasteful number, since it uses less digits than its factorization.

25155020513 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3233.

The product of its (nonzero) digits is 7500, while the sum is 29.

Adding to 25155020513 its reverse (31502055152), we get a palindrome (56657075665).

The spelling of 25155020513 in words is "twenty-five billion, one hundred fifty-five million, twenty thousand, five hundred thirteen".