25158121216 has 36 divisors (see below), whose sum is σ = 50234877000. Its totient is φ = 12574825472.

The previous prime is 25158121189. The next prime is 25158121243. The reversal of 25158121216 is 61212185152.

It is an interprime number because it is at equal distance from previous prime (25158121189) and next prime (25158121243).

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 829650 + ... + 859438.

It is an arithmetic number, because the mean of its divisors is an integer number (1395413250).

Almost surely, 2^25158121216 is an apocalyptic number.

It is an amenable number.

25158121216 is a deficient number, since it is larger than the sum of its proper divisors (25076755784).

25158121216 is an equidigital number, since it uses as much as digits as its factorization.

25158121216 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 33104 (or 33090 counting only the distinct ones).

The product of its digits is 9600, while the sum is 34.

The spelling of 25158121216 in words is "twenty-five billion, one hundred fifty-eight million, one hundred twenty-one thousand, two hundred sixteen".