997822154752 has 24 divisors (see below), whose sum is σ = 1995157095750. Its totient is φ = 498911076352.

The previous prime is 997822154737. The next prime is 997822154809. The reversal of 997822154752 is 257451228799.

It can be written as a sum of positive squares in only one way, i.e., 995078071296 + 2744083456 = 997536^2 + 52384^2 .

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 243606877 + ... + 243610972.

Almost surely, 2^997822154752 is an apocalyptic number.

It is an amenable number.

997822154752 is a deficient number, since it is larger than the sum of its proper divisors (997334940998).

997822154752 is an equidigital number, since it uses as much as digits as its factorization.

997822154752 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 487217871 (or 487217851 counting only the distinct ones).

The product of its digits is 25401600, while the sum is 61.

The spelling of 997822154752 in words is "nine hundred ninety-seven billion, eight hundred twenty-two million, one hundred fifty-four thousand, seven hundred fifty-two".