4891551604940 has 192 divisors, whose sum is σ = 13794735144960. Its totient is φ = 1407092981760.

The previous prime is 4891551604913. The next prime is 4891551604969. The reversal of 4891551604940 is 494061551984.

It is a happy number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 121681484 + ... + 121721676.

It is an arithmetic number, because the mean of its divisors is an integer number (71847578880).

Almost surely, 2^{4891551604940} 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 4891551604940, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (6897367572480).

4891551604940 is an abundant number, since it is smaller than the sum of its proper divisors (8903183540020).

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

4891551604940 is a wasteful number, since it uses less digits than its factorization.

4891551604940 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 46312 (or 46310 counting only the distinct ones).

The product of its (nonzero) digits is 6220800, while the sum is 56.

The spelling of 4891551604940 in words is "four trillion, eight hundred ninety-one billion, five hundred fifty-one million, six hundred four thousand, nine hundred forty".