9807905011640 has 384 divisors, whose sum is σ = 24673790453760. Its totient is φ = 3496253325312.

The previous prime is 9807905011591. The next prime is 9807905011649. The reversal of 9807905011640 is 461105097089.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (9807905011649) by changing a digit.

It is a polite number, since it can be written in 95 ways as a sum of consecutive naturals, for example, 25608106889 + ... + 25608107271.

It is an arithmetic number, because the mean of its divisors is an integer number (64254662640).

Almost surely, 2^{9807905011640} 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 9807905011640, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (12336895226880).

9807905011640 is an abundant number, since it is smaller than the sum of its proper divisors (14865885442120).

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

9807905011640 is a wasteful number, since it uses less digits than its factorization.

9807905011640 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 991 (or 964 counting only the distinct ones).

The product of its (nonzero) digits is 544320, while the sum is 50.

The spelling of 9807905011640 in words is "nine trillion, eight hundred seven billion, nine hundred five million, eleven thousand, six hundred forty".