161535250555 has 16 divisors (see below), whose sum is σ = 222203361024. Its totient is φ = 110432377440.

The previous prime is 161535250531. The next prime is 161535250603. The reversal of 161535250555 is 555052535161.

It is not a de Polignac number, because 161535250555 - 2¹⁹ = 161534726267 is a prime.

It is a Duffinian 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, 6960157 + ... + 6983326.

It is an arithmetic number, because the mean of its divisors is an integer number (13887710064).

Almost surely, 2^161535250555 is an apocalyptic number.

161535250555 is a deficient number, since it is larger than the sum of its proper divisors (60668110469).

161535250555 is a wasteful number, since it uses less digits than its factorization.

161535250555 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13943826.

The product of its (nonzero) digits is 562500, while the sum is 43.

The spelling of 161535250555 in words is "one hundred sixty-one billion, five hundred thirty-five million, two hundred fifty thousand, five hundred fifty-five".