161367818558 has 16 divisors (see below), whose sum is σ = 254810855040. Its totient is φ = 76431519000.

The previous prime is 161367818537. The next prime is 161367818587. The reversal of 161367818558 is 855818763161.

It is a junction number, because it is equal to n+sod(n) for n = 161367818497 and 161367818506.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 360233 + ... + 672683.

It is an arithmetic number, because the mean of its divisors is an integer number (15925678440).

Almost surely, 2^161367818558 is an apocalyptic number.

161367818558 is a deficient number, since it is larger than the sum of its proper divisors (93443036482).

161367818558 is a wasteful number, since it uses less digits than its factorization.

161367818558 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 326063.

The product of its digits is 9676800, while the sum is 59.

The spelling of 161367818558 in words is "one hundred sixty-one billion, three hundred sixty-seven million, eight hundred eighteen thousand, five hundred fifty-eight".