15384740817853 has 4 divisors (see below), whose sum is σ = 16783353619488. Its totient is φ = 13986128016220.

The previous prime is 15384740817773. The next prime is 15384740817863. The reversal of 15384740817853 is 35871804748351.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-15384740817853 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (15384740817863) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 699306400801 + ... + 699306400822.

It is an arithmetic number, because the mean of its divisors is an integer number (4195838404872).

Almost surely, 2^{15384740817853} is an apocalyptic number.

It is an amenable number.

15384740817853 is a deficient number, since it is larger than the sum of its proper divisors (1398612801635).

15384740817853 is a wasteful number, since it uses less digits than its factorization.

15384740817853 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1398612801634.

The product of its (nonzero) digits is 90316800, while the sum is 64.

The spelling of 15384740817853 in words is "fifteen trillion, three hundred eighty-four billion, seven hundred forty million, eight hundred seventeen thousand, eight hundred fifty-three".