15535948387 has 4 divisors (see below), whose sum is σ = 15536205280. Its totient is φ = 15535691496.

The previous prime is 15535948343. The next prime is 15535948399. The reversal of 15535948387 is 78384953551.

It is a happy number.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-15535948387 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (15535948787) 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, 17689 + ... + 177157.

It is an arithmetic number, because the mean of its divisors is an integer number (3884051320).

Almost surely, 2^15535948387 is an apocalyptic number.

15535948387 is a deficient number, since it is larger than the sum of its proper divisors (256893).

15535948387 is an equidigital number, since it uses as much as digits as its factorization.

15535948387 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 256892.

The product of its digits is 18144000, while the sum is 58.

The spelling of 15535948387 in words is "fifteen billion, five hundred thirty-five million, nine hundred forty-eight thousand, three hundred eighty-seven".