2158773078528 has 800 divisors, whose sum is σ = 7435060554240. Its totient is φ = 616735088640.

The previous prime is 2158773078493. The next prime is 2158773078563. The reversal of 2158773078528 is 8258703778512.

2158773078528 is a `hidden beast` number, since 2 + 1 + 5 + 8 + 7 + 7 + 30 + 78 + 528 = 666.

It is an interprime number because it is at equal distance from previous prime (2158773078493) and next prime (2158773078563).

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 79 ways as a sum of consecutive naturals, for example, 2279590951 + ... + 2279591897.

Almost surely, 2^{2158773078528} 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 2158773078528, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (3717530277120).

2158773078528 is an abundant number, since it is smaller than the sum of its proper divisors (5276287475712).

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

2158773078528 is a wasteful number, since it uses less digits than its factorization.

2158773078528 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1270 (or 1245 counting only the distinct ones).

The product of its (nonzero) digits is 52684800, while the sum is 63.

The spelling of 2158773078528 in words is "two trillion, one hundred fifty-eight billion, seven hundred seventy-three million, seventy-eight thousand, five hundred twenty-eight".