161222660161216 has 56 divisors (see below), whose sum is σ = 320095809073040. Its totient is φ = 80568605601792.

The previous prime is 161222660161193. The next prime is 161222660161237. The reversal of 161222660161216 is 612161066222161.

It is a super-2 number, since 2×161222660161216² (a number of 29 digits) contains 22 as substring.

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, 1522596211 + ... + 1522702093.

It is an arithmetic number, because the mean of its divisors is an integer number (5715996590590).

Almost surely, 2^{161222660161216} is an apocalyptic number.

161222660161216 is a gapful number since it is divisible by the number (16) formed by its first and last digit.

It is an amenable number.

161222660161216 is a deficient number, since it is larger than the sum of its proper divisors (158873148911824).

161222660161216 is a wasteful number, since it uses less digits than its factorization.

161222660161216 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 118281 (or 118271 counting only the distinct ones).

The product of its (nonzero) digits is 124416, while the sum is 43.

The spelling of 161222660161216 in words is "one hundred sixty-one trillion, two hundred twenty-two billion, six hundred sixty million, one hundred sixty-one thousand, two hundred sixteen".