91641494644 has 48 divisors (see below), whose sum is σ = 185665277952. Its totient is φ = 38767583232.

The previous prime is 91641494641. The next prime is 91641494671. The reversal of 91641494644 is 44649414619.

It is a junction number, because it is equal to n+sod(n) for n = 91641494591 and 91641494600.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (91641494641) 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 15 ways as a sum of consecutive naturals, for example, 635124 + ... + 765940.

It is an arithmetic number, because the mean of its divisors is an integer number (3868026624).

Almost surely, 2^91641494644 is an apocalyptic number.

It is an amenable number.

91641494644 is an abundant number, since it is smaller than the sum of its proper divisors (94023783308).

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

91641494644 is a wasteful number, since it uses less digits than its factorization.

91641494644 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 131152 (or 131150 counting only the distinct ones).

The product of its digits is 2985984, while the sum is 52.

The spelling of 91641494644 in words is "ninety-one billion, six hundred forty-one million, four hundred ninety-four thousand, six hundred forty-four".