2145768542 has 16 divisors (see below), whose sum is σ = 3294825072. Its totient is φ = 1047513600.

The previous prime is 2145768523. The next prime is 2145768563. The reversal of 2145768542 is 2458675412.

It is a Smith number, since the sum of its digits (44) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a junction number, because it is equal to n+sod(n) for n = 2145768493 and 2145768502.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 410288 + ... + 415484.

It is an arithmetic number, because the mean of its divisors is an integer number (205926567).

Almost surely, 2^2145768542 is an apocalyptic number.

2145768542 is a deficient number, since it is larger than the sum of its proper divisors (1149056530).

2145768542 is a wasteful number, since it uses less digits than its factorization.

2145768542 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10043.

The product of its digits is 537600, while the sum is 44.

The square root of 2145768542 is about 46322.4410194454. The cubic root of 2145768542 is about 1289.8155981032.

The spelling of 2145768542 in words is "two billion, one hundred forty-five million, seven hundred sixty-eight thousand, five hundred forty-two".