2165477541860 has 48 divisors (see below), whose sum is σ = 4559728965120. Its totient is φ = 863862975360.

The previous prime is 2165477541827. The next prime is 2165477541869. The reversal of 2165477541860 is 681457745612.

It is a junction number, because it is equal to n+sod(n) for n = 2165477541796 and 2165477541805.

It is not an unprimeable number, because it can be changed into a prime (2165477541869) 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, 55234865 + ... + 55274055.

It is an arithmetic number, because the mean of its divisors is an integer number (94994353440).

Almost surely, 2^{2165477541860} is an apocalyptic number.

2165477541860 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

2165477541860 is an abundant number, since it is smaller than the sum of its proper divisors (2394251423260).

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

2165477541860 is a wasteful number, since it uses less digits than its factorization.

2165477541860 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 46556 (or 46554 counting only the distinct ones).

The product of its (nonzero) digits is 11289600, while the sum is 56.

The spelling of 2165477541860 in words is "two trillion, one hundred sixty-five billion, four hundred seventy-seven million, five hundred forty-one thousand, eight hundred sixty".