161222937612 has 36 divisors (see below), whose sum is σ = 413494645368. Its totient is φ = 48855435200.

The previous prime is 161222937593. The next prime is 161222937637. The reversal of 161222937612 is 216739222161.

It is a happy number.

It is a super-2 number, since 2×161222937612² (a number of 23 digits) contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 55516089 + ... + 55518992.

Almost surely, 2^161222937612 is an apocalyptic number.

161222937612 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

161222937612 is an abundant number, since it is smaller than the sum of its proper divisors (252271707756).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

161222937612 is a wasteful number, since it uses less digits than its factorization.

161222937612 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 111035110 (or 111035097 counting only the distinct ones).

The product of its digits is 108864, while the sum is 42.

The spelling of 161222937612 in words is "one hundred sixty-one billion, two hundred twenty-two million, nine hundred thirty-seven thousand, six hundred twelve".