1997374272900 has 144 divisors (see below), whose sum is σ = 5865931431360. Its totient is φ = 524681024000.

The previous prime is 1997374272899. The next prime is 1997374272911. The reversal of 1997374272900 is 92724737991.

It is a Harshad number since it is a multiple of its sum of digits (60).

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 5801791 + ... + 6136409.

It is an arithmetic number, because the mean of its divisors is an integer number (40735634940).

Almost surely, 2^{1997374272900} is an apocalyptic number.

1997374272900 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1997374272900, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2932965715680).

1997374272900 is an abundant number, since it is smaller than the sum of its proper divisors (3868557158460).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

1997374272900 is a wasteful number, since it uses less digits than its factorization.

1997374272900 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 334934 (or 334927 counting only the distinct ones).

The product of its (nonzero) digits is 12002256, while the sum is 60.

The spelling of 1997374272900 in words is "one trillion, nine hundred ninety-seven billion, three hundred seventy-four million, two hundred seventy-two thousand, nine hundred".