161310771015 has 16 divisors (see below), whose sum is σ = 258789192288. Its totient is φ = 85801758336.

The previous prime is 161310770987. The next prime is 161310771031. The reversal of 161310771015 is 510177013161.

It is not a de Polignac number, because 161310771015 - 2¹⁷ = 161310639943 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 14410024 + ... + 14421213.

It is an arithmetic number, because the mean of its divisors is an integer number (16174324518).

Almost surely, 2^161310771015 is an apocalyptic number.

161310771015 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

161310771015 is a deficient number, since it is larger than the sum of its proper divisors (97478421273).

161310771015 is a wasteful number, since it uses less digits than its factorization.

161310771015 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 28831618.

The product of its (nonzero) digits is 4410, while the sum is 33.

Adding to 161310771015 its reverse (510177013161), we get a palindrome (671487784176).

The spelling of 161310771015 in words is "one hundred sixty-one billion, three hundred ten million, seven hundred seventy-one thousand, fifteen".