91668352032 has 36 divisors (see below), whose sum is σ = 260681876910. Its totient is φ = 30556117248.

The previous prime is 91668352001. The next prime is 91668352037. The reversal of 91668352032 is 23025386619.

91668352032 is a `hidden beast` number, since 9 + 16 + 6 + 83 + 520 + 32 = 666.

It can be written as a sum of positive squares in only one way, i.e., 82343745936 + 9324606096 = 286956^2 + 96564^2 .

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

It is not an unprimeable number, because it can be changed into a prime (91668352037) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 159146157 + ... + 159146732.

Almost surely, 2^91668352032 is an apocalyptic number.

It is an amenable number.

91668352032 is an abundant number, since it is smaller than the sum of its proper divisors (169013524878).

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

91668352032 is a wasteful number, since it uses less digits than its factorization.

91668352032 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 318292905 (or 318292894 counting only the distinct ones).

The product of its (nonzero) digits is 466560, while the sum is 45.

The spelling of 91668352032 in words is "ninety-one billion, six hundred sixty-eight million, three hundred fifty-two thousand, thirty-two".