2145680849177 has 4 divisors (see below), whose sum is σ = 2153657358180. Its totient is φ = 2137704340176.

The previous prime is 2145680849173. The next prime is 2145680849183. The reversal of 2145680849177 is 7719480865412.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 701944028041 + 1443736821136 = 837821^2 + 1201556^2 .

It is a cyclic number.

It is not a de Polignac number, because 2145680849177 - 2² = 2145680849173 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (2145680849173) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3988254098 + ... + 3988254635.

It is an arithmetic number, because the mean of its divisors is an integer number (538414339545).

Almost surely, 2^{2145680849177} is an apocalyptic number.

It is an amenable number.

2145680849177 is a deficient number, since it is larger than the sum of its proper divisors (7976509003).

2145680849177 is an equidigital number, since it uses as much as digits as its factorization.

2145680849177 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7976509002.

The product of its (nonzero) digits is 27095040, while the sum is 62.

The spelling of 2145680849177 in words is "two trillion, one hundred forty-five billion, six hundred eighty million, eight hundred forty-nine thousand, one hundred seventy-seven".