161207469542 has 48 divisors (see below), whose sum is σ = 299073673008. Its totient is φ = 64754887680.

The previous prime is 161207469463. The next prime is 161207469571. The reversal of 161207469542 is 245964702161.

161207469542 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a super-2 number, since 2×161207469542² (a number of 23 digits) contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

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 23 ways as a sum of consecutive naturals, for example, 200753 + ... + 602259.

It is an arithmetic number, because the mean of its divisors is an integer number (6230701521).

Almost surely, 2^161207469542 is an apocalyptic number.

It is a pronic number, being equal to 401506×401507.

161207469542 is a deficient number, since it is larger than the sum of its proper divisors (137866203466).

161207469542 is a wasteful number, since it uses less digits than its factorization.

161207469542 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 401781 (or 401774 counting only the distinct ones).

The product of its (nonzero) digits is 725760, while the sum is 47.

The spelling of 161207469542 in words is "one hundred sixty-one billion, two hundred seven million, four hundred sixty-nine thousand, five hundred forty-two".