181964857352 has 8 divisors (see below), whose sum is σ = 341184107550. Its totient is φ = 90982428672.

The previous prime is 181964857339. The next prime is 181964857369. The reversal of 181964857352 is 253758469181.

It can be written as a sum of positive squares in only one way, i.e., 134669916676 + 47294940676 = 366974^2 + 217474^2 .

It is a tau number, because it is divible by the number of its divisors (8).

It is a super-2 number, since 2×181964857352² (a number of 23 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 181964857291 and 181964857300.

It is an unprimeable number.

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 as a sum of consecutive naturals, namely, 11372803577 + ... + 11372803592.

Almost surely, 2^181964857352 is an apocalyptic number.

It is an amenable number.

181964857352 is a deficient number, since it is larger than the sum of its proper divisors (159219250198).

181964857352 is a wasteful number, since it uses less digits than its factorization.

181964857352 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 22745607175 (or 22745607171 counting only the distinct ones).

The product of its digits is 14515200, while the sum is 59.

The spelling of 181964857352 in words is "one hundred eighty-one billion, nine hundred sixty-four million, eight hundred fifty-seven thousand, three hundred fifty-two".