161118077226780 has 96 divisors (see below), whose sum is σ = 459665916704064. Its totient is φ = 42152017383424.

The previous prime is 161118077226763. The next prime is 161118077226797. The reversal of 161118077226780 is 87622770811161.

It is an interprime number because it is at equal distance from previous prime (161118077226763) and next prime (161118077226797).

It is a self number, because there is not a number n which added to its sum of digits gives 161118077226780.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 61661842 + ... + 64221638.

It is an arithmetic number, because the mean of its divisors is an integer number (4788186632334).

Almost surely, 2^{161118077226780} is an apocalyptic number.

161118077226780 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

161118077226780 is an abundant number, since it is smaller than the sum of its proper divisors (298547839477284).

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

161118077226780 is a wasteful number, since it uses less digits than its factorization.

161118077226780 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2579655 (or 2579653 counting only the distinct ones).

The product of its (nonzero) digits is 3161088, while the sum is 57.

The spelling of 161118077226780 in words is "one hundred sixty-one trillion, one hundred eighteen billion, seventy-seven million, two hundred twenty-six thousand, seven hundred eighty".