2045245858178 has 4 divisors (see below), whose sum is σ = 3067868787270. Its totient is φ = 1022622929088.

The previous prime is 2045245858171. The next prime is 2045245858199. The reversal of 2045245858178 is 8718585425402.

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

It can be written as a sum of positive squares in only one way, i.e., 1999828707409 + 45417150769 = 1414153^2 + 213113^2 .

It is not an unprimeable number, because it can be changed into a prime (2045245858171) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 511311464543 + ... + 511311464546.

Almost surely, 2^{2045245858178} is an apocalyptic number.

2045245858178 is a deficient number, since it is larger than the sum of its proper divisors (1022622929092).

2045245858178 is a wasteful number, since it uses less digits than its factorization.

2045245858178 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1022622929091.

The product of its (nonzero) digits is 28672000, while the sum is 59.

The spelling of 2045245858178 in words is "two trillion, forty-five billion, two hundred forty-five million, eight hundred fifty-eight thousand, one hundred seventy-eight".