91550420330 has 8 divisors (see below), whose sum is σ = 164790756612. Its totient is φ = 36620168128.

The previous prime is 91550420281. The next prime is 91550420341. The reversal of 91550420330 is 3302405519.

It is a Cunningham number, because it is equal to 302573²+1.

It can be written as a sum of positive squares in 2 ways, for example, as 91550420329 + 1 = 302573^2 + 1^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

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 3 ways as a sum of consecutive naturals, for example, 4577521007 + ... + 4577521026.

Almost surely, 2^91550420330 is an apocalyptic number.

91550420330 is a deficient number, since it is larger than the sum of its proper divisors (73240336282).

91550420330 is a wasteful number, since it uses less digits than its factorization.

91550420330 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9155042040.

The product of its (nonzero) digits is 16200, while the sum is 32.

Adding to 91550420330 its reverse (3302405519), we get a palindrome (94852825849).

The spelling of 91550420330 in words is "ninety-one billion, five hundred fifty million, four hundred twenty thousand, three hundred thirty".