91444760121552 has 40 divisors (see below), whose sum is σ = 236233090787136. Its totient is φ = 30481484280576.

The previous prime is 91444760121439. The next prime is 91444760121563. The reversal of 91444760121552 is 25512106744419.

It is a junction number, because it is equal to n+sod(n) for n = 91444760121495 and 91444760121504.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 11974188 + ... + 18062964.

Almost surely, 2^{91444760121552} is an apocalyptic number.

It is an amenable number.

91444760121552 is an abundant number, since it is smaller than the sum of its proper divisors (144788330665584).

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

91444760121552 is a wasteful number, since it uses less digits than its factorization.

91444760121552 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6401675 (or 6401669 counting only the distinct ones).

The product of its (nonzero) digits is 2419200, while the sum is 51.

The spelling of 91444760121552 in words is "ninety-one trillion, four hundred forty-four billion, seven hundred sixty million, one hundred twenty-one thousand, five hundred fifty-two".