161502040434 has 32 divisors (see below), whose sum is σ = 369505668096. Its totient is φ = 46098671760.

The previous prime is 161502040417. The next prime is 161502040463. The reversal of 161502040434 is 434040205161.

It is an unprimeable number.

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, 1821532 + ... + 1908135.

It is an arithmetic number, because the mean of its divisors is an integer number (11547052128).

Almost surely, 2^161502040434 is an apocalyptic number.

161502040434 is a gapful number since it is divisible by the number (14) formed by its first and last digit.

161502040434 is an abundant number, since it is smaller than the sum of its proper divisors (208003627662).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

161502040434 is a wasteful number, since it uses less digits than its factorization.

161502040434 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3730710.

The product of its (nonzero) digits is 11520, while the sum is 30.

Adding to 161502040434 its reverse (434040205161), we get a palindrome (595542245595).

The spelling of 161502040434 in words is "one hundred sixty-one billion, five hundred two million, forty thousand, four hundred thirty-four".