91050552788 has 48 divisors (see below), whose sum is σ = 179321936640. Its totient is φ = 40172678784.

The previous prime is 91050552781. The next prime is 91050552823. The reversal of 91050552788 is 88725505019.

It is a happy number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (91050552781) by changing a digit.

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 15 ways as a sum of consecutive naturals, for example, 328103 + ... + 538286.

It is an arithmetic number, because the mean of its divisors is an integer number (3735873680).

Almost surely, 2^91050552788 is an apocalyptic number.

It is an amenable number.

91050552788 is a deficient number, since it is larger than the sum of its proper divisors (88271383852).

91050552788 is a wasteful number, since it uses less digits than its factorization.

91050552788 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 866496 (or 866494 counting only the distinct ones).

The product of its (nonzero) digits is 1008000, while the sum is 50.

The spelling of 91050552788 in words is "ninety-one billion, fifty million, five hundred fifty-two thousand, seven hundred eighty-eight".