15978003803253 has 12 divisors (see below), whose sum is σ = 23934129154208. Its totient is φ = 10652002535340.

The previous prime is 15978003803189. The next prime is 15978003803261. The reversal of 15978003803253 is 35230830087951.

15978003803253 is a `hidden beast` number, since 1 + 5 + 9 + 7 + 8 + 0 + 0 + 380 + 3 + 253 = 666.

It is not a de Polignac number, because 15978003803253 - 2⁶ = 15978003803189 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 15978003803253.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (15978003803053) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 32876550793 + ... + 32876551278.

Almost surely, 2^{15978003803253} is an apocalyptic number.

It is an amenable number.

15978003803253 is a deficient number, since it is larger than the sum of its proper divisors (7956125350955).

15978003803253 is an frugal number, since it uses more digits than its factorization.

15978003803253 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 65753102086 (or 65753102074 counting only the distinct ones).

The product of its (nonzero) digits is 5443200, while the sum is 54.

The spelling of 15978003803253 in words is "fifteen trillion, nine hundred seventy-eight billion, three million, eight hundred three thousand, two hundred fifty-three".