2120778525600 has 1728 divisors, whose sum is σ = 9464244249600. Its totient is φ = 455713413120.

The previous prime is 2120778525599. The next prime is 2120778525617. The reversal of 2120778525600 is 65258770212.

2120778525600 is a `hidden beast` number, since 2 + 1 + 2 + 0 + 7 + 7 + 85 + 2 + 560 + 0 = 666.

It is a super-2 number, since 2×2120778525600² (a number of 25 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 287 ways as a sum of consecutive naturals, for example, 3277864477 + ... + 3277865123.

It is an arithmetic number, because the mean of its divisors is an integer number (5476993200).

Almost surely, 2^{2120778525600} is an apocalyptic number.

2120778525600 is a gapful number since it is divisible by the number (20) 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 2120778525600, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (4732122124800).

2120778525600 is an abundant number, since it is smaller than the sum of its proper divisors (7343465724000).

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

2120778525600 is a wasteful number, since it uses less digits than its factorization.

2120778525600 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 872 (or 846 counting only the distinct ones).

The product of its (nonzero) digits is 470400, while the sum is 45.

The spelling of 2120778525600 in words is "two trillion, one hundred twenty billion, seven hundred seventy-eight million, five hundred twenty-five thousand, six hundred".