91669862052 has 30 divisors (see below), whose sum is σ = 239643127878. Its totient is φ = 30556620576.

The previous prime is 91669862017. The next prime is 91669862057. The reversal of 91669862052 is 25026896619.

It is a happy number.

91669862052 is a `hidden beast` number, since 9 + 1 + 6 + 6 + 9 + 8 + 620 + 5 + 2 = 666.

It can be written as a sum of positive squares in only one way, i.e., 81982578276 + 9687283776 = 286326^2 + 98424^2 .

It is a Harshad number since it is a multiple of its sum of digits (54).

It is a self number, because there is not a number n which added to its sum of digits gives 91669862052.

It is not an unprimeable number, because it can be changed into a prime (91669862057) by changing a digit.

It is a polite number, since it can be written in 9 ways as a sum of consecutive naturals, for example, 141465513 + ... + 141466160.

Almost surely, 2^91669862052 is an apocalyptic number.

It is an amenable number.

91669862052 is an abundant number, since it is smaller than the sum of its proper divisors (147973265826).

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

91669862052 is a wasteful number, since it uses less digits than its factorization.

91669862052 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 282931689 (or 282931678 counting only the distinct ones).

The product of its (nonzero) digits is 2799360, while the sum is 54.

The spelling of 91669862052 in words is "ninety-one billion, six hundred sixty-nine million, eight hundred sixty-two thousand, fifty-two".