161215175051 has 16 divisors (see below), whose sum is σ = 192807552000. Its totient is φ = 131797641888.

The previous prime is 161215175039. The next prime is 161215175071. The reversal of 161215175051 is 150571512161.

It is not a de Polignac number, because 161215175051 - 2¹⁴ = 161215158667 is a prime.

It is not an unprimeable number, because it can be changed into a prime (161215175071) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1378391 + ... + 1490768.

It is an arithmetic number, because the mean of its divisors is an integer number (12050472000).

Almost surely, 2^161215175051 is an apocalyptic number.

161215175051 is a deficient number, since it is larger than the sum of its proper divisors (31592376949).

161215175051 is a wasteful number, since it uses less digits than its factorization.

161215175051 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2869538.

The product of its (nonzero) digits is 10500, while the sum is 35.

The spelling of 161215175051 in words is "one hundred sixty-one billion, two hundred fifteen million, one hundred seventy-five thousand, fifty-one".