97488621491 has 16 divisors (see below), whose sum is σ = 102113561088. Its totient is φ = 92896214400.

The previous prime is 97488621473. The next prime is 97488621499. The reversal of 97488621491 is 19412688479.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-97488621491 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 97488621491.

It is not an unprimeable number, because it can be changed into a prime (97488621499) 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, 25919051 + ... + 25922811.

It is an arithmetic number, because the mean of its divisors is an integer number (6382097568).

Almost surely, 2^97488621491 is an apocalyptic number.

97488621491 is a deficient number, since it is larger than the sum of its proper divisors (4624939597).

97488621491 is a wasteful number, since it uses less digits than its factorization.

97488621491 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7762.

The product of its digits is 6967296, while the sum is 59.

The spelling of 97488621491 in words is "ninety-seven billion, four hundred eighty-eight million, six hundred twenty-one thousand, four hundred ninety-one".