2145608078 has 8 divisors (see below), whose sum is σ = 3226686840. Its totient is φ = 1070045800.

The previous prime is 2145608057. The next prime is 2145608081. The reversal of 2145608078 is 8708065412.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a super-4 number, since 4×2145608078⁴ (a number of 38 digits) contains 4444 as substring.

It is a Curzon number.

It is a congruent number.

It is an unprimeable number.

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 3 ways as a sum of consecutive naturals, for example, 1378148 + ... + 1379703.

It is an arithmetic number, because the mean of its divisors is an integer number (403335855).

Almost surely, 2^2145608078 is an apocalyptic number.

2145608078 is a deficient number, since it is larger than the sum of its proper divisors (1081078762).

2145608078 is a wasteful number, since it uses less digits than its factorization.

2145608078 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2758242.

The product of its (nonzero) digits is 107520, while the sum is 41.

The square root of 2145608078 is about 46320.7089539873. The cubic root of 2145608078 is about 1289.7834458113.

The spelling of 2145608078 in words is "two billion, one hundred forty-five million, six hundred eight thousand, seventy-eight".