161315015530 has 8 divisors (see below), whose sum is σ = 290367027972. Its totient is φ = 64526006208.

The previous prime is 161315015513. The next prime is 161315015593. The reversal of 161315015530 is 35510513161.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 161156482249 + 158533281 = 401443^2 + 12591^2 .

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

It is a junction number, because it is equal to n+sod(n) for n = 161315015492 and 161315015501.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 8065750767 + ... + 8065750786.

Almost surely, 2^161315015530 is an apocalyptic number.

161315015530 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

161315015530 is a deficient number, since it is larger than the sum of its proper divisors (129052012442).

161315015530 is a wasteful number, since it uses less digits than its factorization.

161315015530 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 16131501560.

The product of its (nonzero) digits is 6750, while the sum is 31.

Adding to 161315015530 its reverse (35510513161), we get a palindrome (196825528691).

The spelling of 161315015530 in words is "one hundred sixty-one billion, three hundred fifteen million, fifteen thousand, five hundred thirty".