97817545990 has 8 divisors (see below), whose sum is σ = 176071582800. Its totient is φ = 39127018392.

The previous prime is 97817545961. The next prime is 97817545999. The reversal of 97817545990 is 9954571879.

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

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (97817545999) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 4890877290 + ... + 4890877309.

It is an arithmetic number, because the mean of its divisors is an integer number (22008947850).

Almost surely, 2^97817545990 is an apocalyptic number.

97817545990 is a deficient number, since it is larger than the sum of its proper divisors (78254036810).

97817545990 is a wasteful number, since it uses less digits than its factorization.

97817545990 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9781754606.

The product of its (nonzero) digits is 28576800, while the sum is 64.

The spelling of 97817545990 in words is "ninety-seven billion, eight hundred seventeen million, five hundred forty-five thousand, nine hundred ninety".