15983641481 has 4 divisors (see below), whose sum is σ = 16208763264. Its totient is φ = 15758519700.

The previous prime is 15983641477. The next prime is 15983641511. The reversal of 15983641481 is 18414638951.

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, and also an emirpimes, since its reverse is a distinct semiprime: 18414638951 = 137 ⋅134413423.

It is a cyclic number.

It is not a de Polignac number, because 15983641481 - 2² = 15983641477 is a prime.

It is a super-2 number, since 2×15983641481² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (15983601481) 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, 112560785 + ... + 112560926.

It is an arithmetic number, because the mean of its divisors is an integer number (4052190816).

Almost surely, 2^15983641481 is an apocalyptic number.

It is an amenable number.

15983641481 is a deficient number, since it is larger than the sum of its proper divisors (225121783).

15983641481 is an equidigital number, since it uses as much as digits as its factorization.

15983641481 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 225121782.

The product of its digits is 829440, while the sum is 50.

The spelling of 15983641481 in words is "fifteen billion, nine hundred eighty-three million, six hundred forty-one thousand, four hundred eighty-one".