1516381843 has 8 divisors (see below), whose sum is σ = 1554406560. Its totient is φ = 1478406720.

The previous prime is 1516381837. The next prime is 1516381847. The reversal of 1516381843 is 3481836151.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1516381843 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 1516381796 and 1516381805.

It is not an unprimeable number, because it can be changed into a prime (1516381847) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 53898 + ... + 77056.

It is an arithmetic number, because the mean of its divisors is an integer number (194300820).

Almost surely, 2^1516381843 is an apocalyptic number.

1516381843 is a deficient number, since it is larger than the sum of its proper divisors (38024717).

1516381843 is a wasteful number, since it uses less digits than its factorization.

1516381843 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 24797.

The product of its digits is 69120, while the sum is 40.

The square root of 1516381843 is about 38940.7478484941. The cubic root of 1516381843 is about 1148.8663921806.

The spelling of 1516381843 in words is "one billion, five hundred sixteen million, three hundred eighty-one thousand, eight hundred forty-three".