91621637065011 has 8 divisors (see below), whose sum is σ = 122190974234560. Its totient is φ = 61066695636072.

The previous prime is 91621637064989. The next prime is 91621637065039. The reversal of 91621637065011 is 11056073612619.

It is a happy number.

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

It is not a de Polignac number, because 91621637065011 - 2⁹ = 91621637064499 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (91621637065111) 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, 3598920301 + ... + 3598945758.

It is an arithmetic number, because the mean of its divisors is an integer number (15273871779320).

Almost surely, 2^{91621637065011} is an apocalyptic number.

91621637065011 is a deficient number, since it is larger than the sum of its proper divisors (30569337169549).

91621637065011 is a wasteful number, since it uses less digits than its factorization.

91621637065011 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7197870305.

The product of its (nonzero) digits is 408240, while the sum is 48.

The spelling of 91621637065011 in words is "ninety-one trillion, six hundred twenty-one billion, six hundred thirty-seven million, sixty-five thousand, eleven".