161569212480 has 672 divisors, whose sum is σ = 624038059008. Its totient is φ = 38098944000.

The previous prime is 161569212451. The next prime is 161569212527. The reversal of 161569212480 is 84212965161.

161569212480 is a `hidden beast` number, since 1 + 6 + 1 + 569 + 2 + 1 + 2 + 4 + 80 = 666.

It is a super-2 number, since 2×161569212480² (a number of 23 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is an unprimeable number.

It is a polite number, since it can be written in 95 ways as a sum of consecutive naturals, for example, 124187830 + ... + 124189130.

It is an arithmetic number, because the mean of its divisors is an integer number (928628064).

Almost surely, 2^161569212480 is an apocalyptic number.

161569212480 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 161569212480, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (312019029504).

161569212480 is an abundant number, since it is smaller than the sum of its proper divisors (462468846528).

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

161569212480 is a wasteful number, since it uses less digits than its factorization.

161569212480 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1475 (or 1462 counting only the distinct ones).

The product of its (nonzero) digits is 207360, while the sum is 45.

The spelling of 161569212480 in words is "one hundred sixty-one billion, five hundred sixty-nine million, two hundred twelve thousand, four hundred eighty".