161563565430 has 48 divisors (see below), whose sum is σ = 420201980640. Its totient is φ = 43069595904.

The previous prime is 161563565381. The next prime is 161563565467. The reversal of 161563565430 is 34565365161.

It is a happy number.

161563565430 is a `hidden beast` number, since 1 + 6 + 1 + 5 + 635 + 6 + 5 + 4 + 3 + 0 = 666.

It is a super-2 number, since 2×161563565430² (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 a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 12562 + ... + 568581.

It is an arithmetic number, because the mean of its divisors is an integer number (8754207930).

Almost surely, 2^161563565430 is an apocalyptic number.

161563565430 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

161563565430 is an abundant number, since it is smaller than the sum of its proper divisors (258638415210).

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

161563565430 is a wasteful number, since it uses less digits than its factorization.

161563565430 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 584245 (or 584242 counting only the distinct ones).

The product of its (nonzero) digits is 972000, while the sum is 45.

The spelling of 161563565430 in words is "one hundred sixty-one billion, five hundred sixty-three million, five hundred sixty-five thousand, four hundred thirty".