161715630854 has 16 divisors (see below), whose sum is σ = 247862608848. Its totient is φ = 79103555232.

The previous prime is 161715630851. The next prime is 161715630859. The reversal of 161715630854 is 458036517161.

It is a happy number.

It is a junction number, because it is equal to n+sod(n) for n = 161715630799 and 161715630808.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (161715630851) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2161517 + ... + 2235080.

It is an arithmetic number, because the mean of its divisors is an integer number (15491413053).

Almost surely, 2^161715630854 is an apocalyptic number.

161715630854 is a deficient number, since it is larger than the sum of its proper divisors (86146977994).

161715630854 is a wasteful number, since it uses less digits than its factorization.

161715630854 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4396999.

The product of its (nonzero) digits is 604800, while the sum is 47.

The spelling of 161715630854 in words is "one hundred sixty-one billion, seven hundred fifteen million, six hundred thirty thousand, eight hundred fifty-four".