161502040406 has 8 divisors (see below), whose sum is σ = 276860640720. Its totient is φ = 69215160168.

The previous prime is 161502040369. The next prime is 161502040417. The reversal of 161502040406 is 604040205161.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a congruent number.

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 3 ways as a sum of consecutive naturals, for example, 5767930001 + ... + 5767930028.

It is an arithmetic number, because the mean of its divisors is an integer number (34607580090).

Almost surely, 2^161502040406 is an apocalyptic number.

161502040406 is a deficient number, since it is larger than the sum of its proper divisors (115358600314).

161502040406 is a wasteful number, since it uses less digits than its factorization.

161502040406 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11535860038.

The product of its (nonzero) digits is 5760, while the sum is 29.

Adding to 161502040406 its reverse (604040205161), we get a palindrome (765542245567).

The spelling of 161502040406 in words is "one hundred sixty-one billion, five hundred two million, forty thousand, four hundred six".