16245253125 has 144 divisors (see below), whose sum is σ = 31620882384. Its totient is φ = 8006400000.

The previous prime is 16245253117. The next prime is 16245253127. The reversal of 16245253125 is 52135254261.

16245253125 is a `hidden beast` number, since 1 + 6 + 2 + 4 + 525 + 3 + 125 = 666.

It can be written as a sum of positive squares in 24 ways, for example, as 8674687044 + 7570566081 = 93138^2 + 87009^2 .

It is not a de Polignac number, because 16245253125 - 2³ = 16245253117 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 16245253125.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (16245253127) by changing a digit.

It is a polite number, since it can be written in 143 ways as a sum of consecutive naturals, for example, 29165347 + ... + 29165903.

It is an arithmetic number, because the mean of its divisors is an integer number (219589461).

Almost surely, 2^16245253125 is an apocalyptic number.

16245253125 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

16245253125 is a deficient number, since it is larger than the sum of its proper divisors (15375629259).

16245253125 is an equidigital number, since it uses as much as digits as its factorization.

16245253125 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 666 (or 643 counting only the distinct ones).

The product of its digits is 72000, while the sum is 36.

It can be divided in two parts, 16245 and 253125, that multiplied together give a square (4112015625 = 64125²).

The spelling of 16245253125 in words is "sixteen billion, two hundred forty-five million, two hundred fifty-three thousand, one hundred twenty-five".