1945515944 has 128 divisors (see below), whose sum is σ = 4122057600. Its totient is φ = 857226240.

The previous prime is 1945515941. The next prime is 1945515959. The reversal of 1945515944 is 4495155491.

It is a super-2 number, since 2×1945515944² = 7570064576716422272, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (1945515941) by changing a digit.

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 31 ways as a sum of consecutive naturals, for example, 18182339 + ... + 18182445.

It is an arithmetic number, because the mean of its divisors is an integer number (32203575).

Almost surely, 2^1945515944 is an apocalyptic number.

It is an amenable number.

1945515944 is an abundant number, since it is smaller than the sum of its proper divisors (2176541656).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

1945515944 is a wasteful number, since it uses less digits than its factorization.

1945515944 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 283 (or 279 counting only the distinct ones).

The product of its digits is 648000, while the sum is 47.

The square root of 1945515944 is about 44108.0031740273. The cubic root of 1945515944 is about 1248.3746221535.

The spelling of 1945515944 in words is "one billion, nine hundred forty-five million, five hundred fifteen thousand, nine hundred forty-four".