161435929687 has 4 divisors (see below), whose sum is σ = 161437109976. Its totient is φ = 161434749400.

The previous prime is 161435929657. The next prime is 161435929693. The reversal of 161435929687 is 786929534161.

161435929687 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-161435929687 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (161435929607) by changing a digit.

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 3 ways as a sum of consecutive naturals, for example, 353293 + ... + 669094.

It is an arithmetic number, because the mean of its divisors is an integer number (40359277494).

Almost surely, 2^161435929687 is an apocalyptic number.

161435929687 is a deficient number, since it is larger than the sum of its proper divisors (1180289).

161435929687 is a wasteful number, since it uses less digits than its factorization.

161435929687 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1180288.

The product of its digits is 19595520, while the sum is 61.

The spelling of 161435929687 in words is "one hundred sixty-one billion, four hundred thirty-five million, nine hundred twenty-nine thousand, six hundred eighty-seven".