91284349690 has 16 divisors (see below), whose sum is σ = 166005767592. Its totient is φ = 36137309184.

The previous prime is 91284349657. The next prime is 91284349691. The reversal of 91284349690 is 9694348219.

It is a Cunningham number, because it is equal to 302133²+1.

It can be written as a sum of positive squares in 4 ways, for example, as 40990456521 + 50293893169 = 202461^2 + 224263^2 .

It is a super-2 number, since 2×91284349690² (a number of 23 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (91284349691) 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, 47052819 + ... + 47054758.

Almost surely, 2^91284349690 is an apocalyptic number.

91284349690 is a deficient number, since it is larger than the sum of its proper divisors (74721417902).

91284349690 is a wasteful number, since it uses less digits than its factorization.

91284349690 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 94107681.

The product of its (nonzero) digits is 3359232, while the sum is 55.

The spelling of 91284349690 in words is "ninety-one billion, two hundred eighty-four million, three hundred forty-nine thousand, six hundred ninety".