2166828407156 has 48 divisors (see below), whose sum is σ = 4415657742720. Its totient is φ = 911070975360.

The previous prime is 2166828407153. The next prime is 2166828407171. The reversal of 2166828407156 is 6517048286612.

It is a super-2 number, since 2×2166828407156² (a number of 25 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2166828407153) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 48636611 + ... + 48681141.

It is an arithmetic number, because the mean of its divisors is an integer number (91992869640).

Almost surely, 2^{2166828407156} is an apocalyptic number.

It is an amenable number.

2166828407156 is an abundant number, since it is smaller than the sum of its proper divisors (2248829335564).

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

2166828407156 is a wasteful number, since it uses less digits than its factorization.

2166828407156 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 77384 (or 77382 counting only the distinct ones).

The product of its (nonzero) digits is 7741440, while the sum is 56.

The spelling of 2166828407156 in words is "two trillion, one hundred sixty-six billion, eight hundred twenty-eight million, four hundred seven thousand, one hundred fifty-six".