91621325848197 has 16 divisors (see below), whose sum is σ = 122445704263680. Its totient is φ = 60939080462832.

The previous prime is 91621325848183. The next prime is 91621325848201. The reversal of 91621325848197 is 79184852312619.

It is not a de Polignac number, because 91621325848197 - 2¹⁹ = 91621325323909 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (91621325448197) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 18374823 + ... + 22822724.

It is an arithmetic number, because the mean of its divisors is an integer number (7652856516480).

Almost surely, 2^{91621325848197} is an apocalyptic number.

It is an amenable number.

91621325848197 is a deficient number, since it is larger than the sum of its proper divisors (30824378415483).

91621325848197 is a wasteful number, since it uses less digits than its factorization.

91621325848197 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 41199272.

The product of its digits is 52254720, while the sum is 66.

The spelling of 91621325848197 in words is "ninety-one trillion, six hundred twenty-one billion, three hundred twenty-five million, eight hundred forty-eight thousand, one hundred ninety-seven".