91355562829439 has 4 divisors (see below), whose sum is σ = 91355586007224. Its totient is φ = 91355539651656.

The previous prime is 91355562829423. The next prime is 91355562829481. The reversal of 91355562829439 is 93492826555319.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 91355562829439 - 2⁴ = 91355562829423 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 (91355562829499) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (31) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 4035632 + ... + 14106645.

It is an arithmetic number, because the mean of its divisors is an integer number (22838896501806).

Almost surely, 2^{91355562829439} is an apocalyptic number.

91355562829439 is a deficient number, since it is larger than the sum of its proper divisors (23177785).

91355562829439 is a wasteful number, since it uses less digits than its factorization.

91355562829439 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 23177784.

The product of its digits is 629856000, while the sum is 71.

The spelling of 91355562829439 in words is "ninety-one trillion, three hundred fifty-five billion, five hundred sixty-two million, eight hundred twenty-nine thousand, four hundred thirty-nine".