91885058561389 has 8 divisors (see below), whose sum is σ = 94178832599808. Its totient is φ = 89605400056080.

The previous prime is 91885058561323. The next prime is 91885058561441. The reversal of 91885058561389 is 98316585058819.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 91885058561389 - 2⁹ = 91885058560877 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (91885058561189) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3528870097 + ... + 3528896134.

It is an arithmetic number, because the mean of its divisors is an integer number (11772354074976).

Almost surely, 2^{91885058561389} is an apocalyptic number.

It is an amenable number.

91885058561389 is a deficient number, since it is larger than the sum of its proper divisors (2293774038419).

91885058561389 is a wasteful number, since it uses less digits than its factorization.

91885058561389 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7057766555.

The product of its (nonzero) digits is 746496000, while the sum is 76.

The spelling of 91885058561389 in words is "ninety-one trillion, eight hundred eighty-five billion, fifty-eight million, five hundred sixty-one thousand, three hundred eighty-nine".