91001204206 has 16 divisors (see below), whose sum is σ = 152543040048. Its totient is φ = 40355300800.

The previous prime is 91001204201. The next prime is 91001204207. The reversal of 91001204206 is 60240210019.

It is a super-2 number, since 2×91001204206² (a number of 23 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (91001204201) 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 7 ways as a sum of consecutive naturals, for example, 50443225 + ... + 50445028.

It is an arithmetic number, because the mean of its divisors is an integer number (9533940003).

Almost surely, 2^91001204206 is an apocalyptic number.

91001204206 is a deficient number, since it is larger than the sum of its proper divisors (61541835842).

91001204206 is a wasteful number, since it uses less digits than its factorization.

91001204206 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 100888307.

The product of its (nonzero) digits is 864, while the sum is 25.

The spelling of 91001204206 in words is "ninety-one billion, one million, two hundred four thousand, two hundred six".