1945487601 has 6 divisors (see below), whose sum is σ = 2810148770. Its totient is φ = 1296991728.

The previous prime is 1945487573. The next prime is 1945487603. The reversal of 1945487601 is 1067845491.

It can be written as a sum of positive squares in only one way, i.e., 1592010000 + 353477601 = 39900^2 + 18801^2 .

It is not a de Polignac number, because 1945487601 - 2¹⁰ = 1945486577 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1945487603) 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 5 ways as a sum of consecutive naturals, for example, 108082636 + ... + 108082653.

Almost surely, 2^1945487601 is an apocalyptic number.

It is an amenable number.

1945487601 is a deficient number, since it is larger than the sum of its proper divisors (864661169).

1945487601 is a wasteful number, since it uses less digits than its factorization.

1945487601 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 216165295 (or 216165292 counting only the distinct ones).

The product of its (nonzero) digits is 241920, while the sum is 45.

The square root of 1945487601 is about 44107.6818819579. The cubic root of 1945487601 is about 1248.3685598621.

The spelling of 1945487601 in words is "one billion, nine hundred forty-five million, four hundred eighty-seven thousand, six hundred one".