161000101515 has 32 divisors (see below), whose sum is σ = 288613460736. Its totient is φ = 75950904960.

The previous prime is 161000101513. The next prime is 161000101609. The reversal of 161000101515 is 515101000161.

It is a happy number.

It is not a de Polignac number, because 161000101515 - 2¹ = 161000101513 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 161000101491 and 161000101500.

It is not an unprimeable number, because it can be changed into a prime (161000101513) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 13179817 + ... + 13192026.

It is an arithmetic number, because the mean of its divisors is an integer number (9019170648).

Almost surely, 2^161000101515 is an apocalyptic number.

161000101515 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

161000101515 is a deficient number, since it is larger than the sum of its proper divisors (127613359221).

161000101515 is a wasteful number, since it uses less digits than its factorization.

161000101515 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 26371899.

The product of its (nonzero) digits is 150, while the sum is 21.

Adding to 161000101515 its reverse (515101000161), we get a palindrome (676101101676).

The spelling of 161000101515 in words is "one hundred sixty-one billion, one hundred one thousand, five hundred fifteen".