1945375138 has 16 divisors (see below), whose sum is σ = 3342467520. Its totient is φ = 831847536.

The previous prime is 1945375051. The next prime is 1945375177. The reversal of 1945375138 is 8315735491.

It is a happy 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, 150633 + ... + 163036.

It is an arithmetic number, because the mean of its divisors is an integer number (208904220).

Almost surely, 2^1945375138 is an apocalyptic number.

1945375138 is a deficient number, since it is larger than the sum of its proper divisors (1397092382).

1945375138 is a wasteful number, since it uses less digits than its factorization.

1945375138 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 314121.

The product of its digits is 453600, while the sum is 46.

The square root of 1945375138 is about 44106.4069949027. The cubic root of 1945375138 is about 1248.3445045424.

The spelling of 1945375138 in words is "one billion, nine hundred forty-five million, three hundred seventy-five thousand, one hundred thirty-eight".