2164645173544 has 32 divisors (see below), whose sum is σ = 4911379807680. Its totient is φ = 873134187264.

The previous prime is 2164645173451. The next prime is 2164645173547. The reversal of 2164645173544 is 4453715464612.

It is a junction number, because it is equal to n+sod(n) for n = 2164645173491 and 2164645173500.

It is not an unprimeable number, because it can be changed into a prime (2164645173547) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1136892522 + ... + 1136894425.

It is an arithmetic number, because the mean of its divisors is an integer number (153480618990).

Almost surely, 2^{2164645173544} is an apocalyptic number.

It is an amenable number.

2164645173544 is an abundant number, since it is smaller than the sum of its proper divisors (2746734634136).

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

2164645173544 is a wasteful number, since it uses less digits than its factorization.

2164645173544 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2273786977 (or 2273786973 counting only the distinct ones).

The product of its digits is 9676800, while the sum is 52.

The spelling of 2164645173544 in words is "two trillion, one hundred sixty-four billion, six hundred forty-five million, one hundred seventy-three thousand, five hundred forty-four".