1945578842 has 8 divisors (see below), whose sum is σ = 2918687232. Its totient is φ = 972683100.

The previous prime is 1945578841. The next prime is 1945578851. The reversal of 1945578842 is 2488755491.

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

It is not an unprimeable number, because it can be changed into a prime (1945578841) 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, 27884 + ... + 68327.

It is an arithmetic number, because the mean of its divisors is an integer number (364835904).

Almost surely, 2^1945578842 is an apocalyptic number.

1945578842 is a deficient number, since it is larger than the sum of its proper divisors (973108390).

1945578842 is a wasteful number, since it uses less digits than its factorization.

1945578842 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 106324.

The product of its digits is 3225600, while the sum is 53.

The square root of 1945578842 is about 44108.7161681226. The cubic root of 1945578842 is about 1248.3880752123.

The spelling of 1945578842 in words is "one billion, nine hundred forty-five million, five hundred seventy-eight thousand, eight hundred forty-two".