91050552789 has 32 divisors (see below), whose sum is σ = 139447762944. Its totient is φ = 51765143040.

The previous prime is 91050552781. The next prime is 91050552823. The reversal of 91050552789 is 98725505019.

It is not a de Polignac number, because 91050552789 - 2³ = 91050552781 is a prime.

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 polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 9740652 + ... + 9749994.

It is an arithmetic number, because the mean of its divisors is an integer number (4357742592).

Almost surely, 2^91050552789 is an apocalyptic number.

It is an amenable number.

91050552789 is a deficient number, since it is larger than the sum of its proper divisors (48397210155).

91050552789 is a wasteful number, since it uses less digits than its factorization.

91050552789 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11657.

The product of its (nonzero) digits is 1134000, while the sum is 51.

The spelling of 91050552789 in words is "ninety-one billion, fifty million, five hundred fifty-two thousand, seven hundred eighty-nine".