161211963024 has 360 divisors, whose sum is σ = 536585614656. Its totient is φ = 44257881600.

The previous prime is 161211963013. The next prime is 161211963037. The reversal of 161211963024 is 420369112161.

It is a happy number.

161211963024 is a `hidden beast` number, since 1 + 6 + 1 + 2 + 1 + 19 + 630 + 2 + 4 = 666.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a self number, because there is not a number n which added to its sum of digits gives 161211963024.

It is an unprimeable number.

It is a polite number, since it can be written in 71 ways as a sum of consecutive naturals, for example, 157895634 + ... + 157896654.

Almost surely, 2^161211963024 is an apocalyptic number.

161211963024 is a gapful number since it is divisible by the number (14) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 161211963024, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (268292807328).

161211963024 is an abundant number, since it is smaller than the sum of its proper divisors (375373651632).

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

161211963024 is a wasteful number, since it uses less digits than its factorization.

161211963024 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1267 (or 1227 counting only the distinct ones).

The product of its (nonzero) digits is 15552, while the sum is 36.

The spelling of 161211963024 in words is "one hundred sixty-one billion, two hundred eleven million, nine hundred sixty-three thousand, twenty-four".