161236248960 has 128 divisors (see below), whose sum is σ = 514106805600. Its totient is φ = 42982424576.

The previous prime is 161236248941. The next prime is 161236248967. The reversal of 161236248960 is 69842632161.

It is a tau number, because it is divible by the number of its divisors (128).

It is a super-2 number, since 2×161236248960² (a number of 23 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (48).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (161236248967) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 6817636 + ... + 6841244.

Almost surely, 2^161236248960 is an apocalyptic number.

161236248960 is a gapful number since it is divisible by the number (10) 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 161236248960, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (257053402800).

161236248960 is an abundant number, since it is smaller than the sum of its proper divisors (352870556640).

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

161236248960 is a wasteful number, since it uses less digits than its factorization.

161236248960 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 27188 (or 27176 counting only the distinct ones).

The product of its (nonzero) digits is 746496, while the sum is 48.

The spelling of 161236248960 in words is "one hundred sixty-one billion, two hundred thirty-six million, two hundred forty-eight thousand, nine hundred sixty".