1945001945 has 16 divisors (see below), whose sum is σ = 2363409360. Its totient is φ = 1536480000.

The previous prime is 1945001887. The next prime is 1945001951. The reversal of 1945001945 is 5491005491.

It can be written as a sum of positive squares in 8 ways, for example, as 261048649 + 1683953296 = 16157^2 + 41036^2 .

It is not a de Polignac number, because 1945001945 - 2¹² = 1944997849 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 1945001899 and 1945001908.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 191495 + ... + 201395.

It is an arithmetic number, because the mean of its divisors is an integer number (147713085).

Almost surely, 2^1945001945 is an apocalyptic number.

It is an amenable number.

1945001945 is a deficient number, since it is larger than the sum of its proper divisors (418407415).

1945001945 is a wasteful number, since it uses less digits than its factorization.

1945001945 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10396.

The product of its (nonzero) digits is 32400, while the sum is 38.

The square root of 1945001945 is about 44102.1761934715. The cubic root of 1945001945 is about 1248.2646736287.

It can be divided in two parts, 194500 and 1945, that multiplied together give a square (378302500 = 19450²).

The spelling of 1945001945 in words is "one billion, nine hundred forty-five million, one thousand, nine hundred forty-five".