2116851955440 has 80 divisors (see below), whose sum is σ = 6579555964800. Its totient is φ = 563004400896.

The previous prime is 2116851955433. The next prime is 2116851955531. The reversal of 2116851955440 is 445591586112.

It is a tau number, because it is divible by the number of its divisors (80).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 11545210 + ... + 11727129.

It is an arithmetic number, because the mean of its divisors is an integer number (82244449560).

Almost surely, 2^{2116851955440} is an apocalyptic number.

2116851955440 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

2116851955440 is an abundant number, since it is smaller than the sum of its proper divisors (4462704009360).

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

2116851955440 is a wasteful number, since it uses less digits than its factorization.

2116851955440 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 23272734 (or 23272728 counting only the distinct ones).

The product of its (nonzero) digits is 1728000, while the sum is 51.

The spelling of 2116851955440 in words is "two trillion, one hundred sixteen billion, eight hundred fifty-one million, nine hundred fifty-five thousand, four hundred forty".