1997910401448 has 128 divisors (see below), whose sum is σ = 5464514119680. Its totient is φ = 605023814400.

The previous prime is 1997910401423. The next prime is 1997910401479. The reversal of 1997910401448 is 8441040197991.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 6663973 + ... + 6957323.

It is an arithmetic number, because the mean of its divisors is an integer number (42691516560).

Almost surely, 2^{1997910401448} 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 1997910401448, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2732257059840).

1997910401448 is an abundant number, since it is smaller than the sum of its proper divisors (3466603718232).

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

1997910401448 is a wasteful number, since it uses less digits than its factorization.

1997910401448 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 293719 (or 293715 counting only the distinct ones).

The product of its (nonzero) digits is 2612736, while the sum is 57.

The spelling of 1997910401448 in words is "one trillion, nine hundred ninety-seven billion, nine hundred ten million, four hundred one thousand, four hundred forty-eight".