161550215387 has 6 divisors (see below), whose sum is σ = 177571724484. Its totient is φ = 146863832060.

The previous prime is 161550215357. The next prime is 161550215417. The reversal of 161550215387 is 783512055161.

161550215387 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is an interprime number because it is at equal distance from previous prime (161550215357) and next prime (161550215417).

It is not a de Polignac number, because 161550215387 - 2¹⁴ = 161550199003 is a prime.

It is not an unprimeable number, because it can be changed into a prime (161550215327) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 667562753 + ... + 667562994.

It is an arithmetic number, because the mean of its divisors is an integer number (29595287414).

Almost surely, 2^161550215387 is an apocalyptic number.

161550215387 is a deficient number, since it is larger than the sum of its proper divisors (16021509097).

161550215387 is a wasteful number, since it uses less digits than its factorization.

161550215387 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1335125769 (or 1335125758 counting only the distinct ones).

The product of its (nonzero) digits is 252000, while the sum is 44.

The spelling of 161550215387 in words is "one hundred sixty-one billion, five hundred fifty million, two hundred fifteen thousand, three hundred eighty-seven".