161545551063 has 16 divisors (see below), whose sum is σ = 232470445536. Its totient is φ = 99195102720.

The previous prime is 161545551019. The next prime is 161545551067. The reversal of 161545551063 is 360155545161.

It is not a de Polignac number, because 161545551063 - 2¹⁶ = 161545485527 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (161545551067) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 4514118 + ... + 4549763.

It is an arithmetic number, because the mean of its divisors is an integer number (14529402846).

Almost surely, 2^161545551063 is an apocalyptic number.

161545551063 is a gapful number since it is divisible by the number (13) formed by its first and last digit.

161545551063 is a deficient number, since it is larger than the sum of its proper divisors (70924894473).

161545551063 is a wasteful number, since it uses less digits than its factorization.

161545551063 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9064354.

The product of its (nonzero) digits is 270000, while the sum is 42.

The spelling of 161545551063 in words is "one hundred sixty-one billion, five hundred forty-five million, five hundred fifty-one thousand, sixty-three".