1945154866 has 8 divisors (see below), whose sum is σ = 2922916464. Its totient is φ = 970849380.

The previous prime is 1945154833. The next prime is 1945154891. The reversal of 1945154866 is 6684515491.

It is a happy number.

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

It is an unprimeable number.

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 in 3 ways as a sum of consecutive naturals, for example, 862620 + ... + 864871.

It is an arithmetic number, because the mean of its divisors is an integer number (365364558).

Almost surely, 2^1945154866 is an apocalyptic number.

1945154866 is a deficient number, since it is larger than the sum of its proper divisors (977761598).

1945154866 is a wasteful number, since it uses less digits than its factorization.

1945154866 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1728056.

The product of its digits is 1036800, while the sum is 49.

The square root of 1945154866 is about 44103.9098720284. The cubic root of 1945154866 is about 1248.2973866859.

The spelling of 1945154866 in words is "one billion, nine hundred forty-five million, one hundred fifty-four thousand, eight hundred sixty-six".