5491065323520 has 3072 divisors, whose sum is σ = 25557014246400. Its totient is φ = 1100753141760.

The previous prime is 5491065323507. The next prime is 5491065323521. The reversal of 5491065323520 is 253235601945.

5491065323520 is a `hidden beast` number, since 5 + 4 + 9 + 106 + 532 + 3 + 5 + 2 + 0 = 666.

It is a tau number, because it is divible by the number of its divisors (3072).

It is a Harshad number since it is a multiple of its sum of digits (45).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (5491065323521) by changing a digit.

It is a polite number, since it can be written in 191 ways as a sum of consecutive naturals, for example, 90017464290 + ... + 90017464350.

It is an arithmetic number, because the mean of its divisors is an integer number (8319340575).

Almost surely, 2^{5491065323520} is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 5491065323520, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (12778507123200).

5491065323520 is an abundant number, since it is smaller than the sum of its proper divisors (20065948922880).

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

5491065323520 is an equidigital number, since it uses as much as digits as its factorization.

5491065323520 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 154 (or 114 counting only the distinct ones).

The product of its (nonzero) digits is 972000, while the sum is 45.

The spelling of 5491065323520 in words is "five trillion, four hundred ninety-one billion, sixty-five million, three hundred twenty-three thousand, five hundred twenty".