161836187703 has 16 divisors (see below), whose sum is σ = 223646686560. Its totient is φ = 104011744896.

The previous prime is 161836187687. The next prime is 161836187707. The reversal of 161836187703 is 307781638161.

It is a happy number.

It is not a de Polignac number, because 161836187703 - 2⁴ = 161836187687 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (161836187707) 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, 6675900 + ... + 6700097.

It is an arithmetic number, because the mean of its divisors is an integer number (13977917910).

Almost surely, 2^161836187703 is an apocalyptic number.

161836187703 is a deficient number, since it is larger than the sum of its proper divisors (61810498857).

161836187703 is a wasteful number, since it uses less digits than its factorization.

161836187703 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13376146.

The product of its (nonzero) digits is 1016064, while the sum is 51.

The spelling of 161836187703 in words is "one hundred sixty-one billion, eight hundred thirty-six million, one hundred eighty-seven thousand, seven hundred three".