25511513245 has 8 divisors (see below), whose sum is σ = 30735784800. Its totient is φ = 20327898000.

The previous prime is 25511513201. The next prime is 25511513273. The reversal of 25511513245 is 54231511552.

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

It is not a de Polignac number, because 25511513245 - 2¹³ = 25511505053 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 25511513245.

It is a congruent number.

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 7 ways as a sum of consecutive naturals, for example, 10162695 + ... + 10165204.

It is an arithmetic number, because the mean of its divisors is an integer number (3841973100).

Almost surely, 2^25511513245 is an apocalyptic number.

It is an amenable number.

25511513245 is a deficient number, since it is larger than the sum of its proper divisors (5224271555).

25511513245 is a wasteful number, since it uses less digits than its factorization.

25511513245 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 20328155.

The product of its digits is 30000, while the sum is 34.

It can be divided in two parts, 25511 and 513245, that added together give a square (538756 = 734²).

The spelling of 25511513245 in words is "twenty-five billion, five hundred eleven million, five hundred thirteen thousand, two hundred forty-five".