2145177645 has 16 divisors (see below), whose sum is σ = 3696306432. Its totient is φ = 1056087360.

The previous prime is 2145177641. The next prime is 2145177677. The reversal of 2145177645 is 5467715412.

It is not a de Polignac number, because 2145177645 - 2² = 2145177641 is a prime.

It is a super-3 number, since 3×2145177645³ (a number of 29 digits) contains 333 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 2145177597 and 2145177606.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2145177641) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 5500261 + ... + 5500650.

It is an arithmetic number, because the mean of its divisors is an integer number (231019152).

Almost surely, 2^2145177645 is an apocalyptic number.

It is an amenable number.

2145177645 is a deficient number, since it is larger than the sum of its proper divisors (1551128787).

2145177645 is a wasteful number, since it uses less digits than its factorization.

2145177645 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11000932.

The product of its digits is 235200, while the sum is 42.

The square root of 2145177645 is about 46316.0624945601. The cubic root of 2145177645 is about 1289.6971917105.

The spelling of 2145177645 in words is "two billion, one hundred forty-five million, one hundred seventy-seven thousand, six hundred forty-five".