1997425734108 has 324 divisors, whose sum is σ = 5722193718360. Its totient is φ = 540068046336.

The previous prime is 1997425734091. The next prime is 1997425734209. The reversal of 1997425734108 is 8014375247991.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 107 ways as a sum of consecutive naturals, for example, 14579749816 + ... + 14579749952.

Almost surely, 2^{1997425734108} is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1997425734108, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2861096859180).

1997425734108 is an abundant number, since it is smaller than the sum of its proper divisors (3724767984252).

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

1997425734108 is a wasteful number, since it uses less digits than its factorization.

1997425734108 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 482 (or 257 counting only the distinct ones).

The product of its (nonzero) digits is 15240960, while the sum is 60.

The spelling of 1997425734108 in words is "one trillion, nine hundred ninety-seven billion, four hundred twenty-five million, seven hundred thirty-four thousand, one hundred eight".