91455509550 has 48 divisors (see below), whose sum is σ = 226832593392. Its totient is φ = 24385670400.

The previous prime is 91455509543. The next prime is 91455509653. The reversal of 91455509550 is 5590555419.

It is a super-2 number, since 2×91455509550² (a number of 23 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 91455509550.

It is a congruent number.

It is an unprimeable number.

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 23 ways as a sum of consecutive naturals, for example, 1831920 + ... + 1881180.

It is an arithmetic number, because the mean of its divisors is an integer number (4725679029).

Almost surely, 2^91455509550 is an apocalyptic number.

91455509550 is an abundant number, since it is smaller than the sum of its proper divisors (135377083842).

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

91455509550 is a wasteful number, since it uses less digits than its factorization.

91455509550 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 61653 (or 61648 counting only the distinct ones).

The product of its (nonzero) digits is 1012500, while the sum is 48.

The spelling of 91455509550 in words is "ninety-one billion, four hundred fifty-five million, five hundred nine thousand, five hundred fifty".