1597810885440 has 672 divisors, whose sum is σ = 6708229570560. Its totient is φ = 314535260160.

The previous prime is 1597810885439. The next prime is 1597810885471. The reversal of 1597810885440 is 445880187951.

It is a tau number, because it is divible by the number of its divisors (672).

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

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 95 ways as a sum of consecutive naturals, for example, 15397569 + ... + 15500991.

It is an arithmetic number, because the mean of its divisors is an integer number (9982484480).

Almost surely, 2^{1597810885440} is an apocalyptic number.

1597810885440 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 1597810885440, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (3354114785280).

1597810885440 is an abundant number, since it is smaller than the sum of its proper divisors (5110418685120).

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

1597810885440 is a wasteful number, since it uses less digits than its factorization.

1597810885440 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 103491 (or 103470 counting only the distinct ones).

The product of its (nonzero) digits is 12902400, while the sum is 60.

The spelling of 1597810885440 in words is "one trillion, five hundred ninety-seven billion, eight hundred ten million, eight hundred eighty-five thousand, four hundred forty".