161935973460 has 36 divisors (see below), whose sum is σ = 491205786708. Its totient is φ = 43182926208.

The previous prime is 161935973401. The next prime is 161935973467. The reversal of 161935973460 is 64379539161.

161935973460 is a `hidden beast` number, since 1 + 6 + 1 + 9 + 3 + 597 + 3 + 46 + 0 = 666.

It can be written as a sum of positive squares in 2 ways, for example, as 107031048336 + 54904925124 = 327156^2 + 234318^2 .

It is a tau number, because it is divible by the number of its divisors (36).

It is a super-3 number, since 3×161935973460³ (a number of 35 digits) contains 333 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 161935973397 and 161935973406.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (161935973467) 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 11 ways as a sum of consecutive naturals, for example, 449821969 + ... + 449822328.

Almost surely, 2^161935973460 is an apocalyptic number.

161935973460 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

161935973460 is an abundant number, since it is smaller than the sum of its proper divisors (329269813248).

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

161935973460 is a wasteful number, since it uses less digits than its factorization.

161935973460 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 899644312 (or 899644307 counting only the distinct ones).

The product of its (nonzero) digits is 3674160, while the sum is 54.

The spelling of 161935973460 in words is "one hundred sixty-one billion, nine hundred thirty-five million, nine hundred seventy-three thousand, four hundred sixty".