161156112263064 has 256 divisors, whose sum is σ = 490358292480000. Its totient is φ = 48812856035328.

The previous prime is 161156112262993. The next prime is 161156112263101. The reversal of 161156112263064 is 460362211651161.

161156112263064 is a `hidden beast` number, since 1 + 6 + 1 + 1 + 5 + 6 + 1 + 1 + 2 + 2 + 630 + 6 + 4 = 666.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 3816402319 + ... + 3816444545.

It is an arithmetic number, because the mean of its divisors is an integer number (1915462080000).

Almost surely, 2^{161156112263064} is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 161156112263064, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (245179146240000).

161156112263064 is an abundant number, since it is smaller than the sum of its proper divisors (329202180216936).

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

161156112263064 is a wasteful number, since it uses less digits than its factorization.

161156112263064 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 78127 (or 78117 counting only the distinct ones).

The product of its (nonzero) digits is 311040, while the sum is 45.

The spelling of 161156112263064 in words is "one hundred sixty-one trillion, one hundred fifty-six billion, one hundred twelve million, two hundred sixty-three thousand, sixty-four".