161562400120 has 64 divisors (see below), whose sum is σ = 396867081600. Its totient is φ = 58704804480.

The previous prime is 161562400093. The next prime is 161562400121. The reversal of 161562400120 is 21004265161.

It is a super-2 number, since 2×161562400120² (a number of 23 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (161562400121) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 434611 + ... + 715549.

It is an arithmetic number, because the mean of its divisors is an integer number (6201048150).

Almost surely, 2^161562400120 is an apocalyptic number.

161562400120 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

161562400120 is an abundant number, since it is smaller than the sum of its proper divisors (235304681480).

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

161562400120 is a wasteful number, since it uses less digits than its factorization.

161562400120 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 282268 (or 282264 counting only the distinct ones).

The product of its (nonzero) digits is 2880, while the sum is 28.

Adding to 161562400120 its reverse (21004265161), we get a palindrome (182566665281).

The spelling of 161562400120 in words is "one hundred sixty-one billion, five hundred sixty-two million, four hundred thousand, one hundred twenty".