1945070215205 has 16 divisors (see below), whose sum is σ = 2518142047344. Its totient is φ = 1433780774400.

The previous prime is 1945070215201. The next prime is 1945070215217. The reversal of 1945070215205 is 5025120705491.

It can be written as a sum of positive squares in 8 ways, for example, as 905849001121 + 1039221214084 = 951761^2 + 1019422^2 .

It is not a de Polignac number, because 1945070215205 - 2² = 1945070215201 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1945070215201) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 26825696 + ... + 26898105.

It is an arithmetic number, because the mean of its divisors is an integer number (157383877959).

Almost surely, 2^{1945070215205} is an apocalyptic number.

It is an amenable number.

1945070215205 is a deficient number, since it is larger than the sum of its proper divisors (573071832139).

1945070215205 is a wasteful number, since it uses less digits than its factorization.

1945070215205 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 53724376.

The product of its (nonzero) digits is 126000, while the sum is 41.

The spelling of 1945070215205 in words is "one trillion, nine hundred forty-five billion, seventy million, two hundred fifteen thousand, two hundred five".