1440135172737 has 20 divisors (see below), whose sum is σ = 2157477298900. Its totient is φ = 957339121824.

The previous prime is 1440135172709. The next prime is 1440135172811. The reversal of 1440135172737 is 7372715310441.

1440135172737 is a `hidden beast` number, since 1 + 4 + 401 + 3 + 5 + 172 + 73 + 7 = 666.

It can be written as a sum of positive squares in 2 ways, for example, as 452822672241 + 987312500496 = 672921^2 + 993636^2 .

It is not a de Polignac number, because 1440135172737 - 2¹⁴ = 1440135156353 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 1440135172692 and 1440135172701.

It is not an unprimeable number, because it can be changed into a prime (1440135172837) by changing a digit.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 25443718 + ... + 25500255.

It is an arithmetic number, because the mean of its divisors is an integer number (107873864945).

Almost surely, 2^{1440135172737} is an apocalyptic number.

It is an amenable number.

1440135172737 is a deficient number, since it is larger than the sum of its proper divisors (717342126163).

1440135172737 is an equidigital number, since it uses as much as digits as its factorization.

1440135172737 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 50944334 (or 50944325 counting only the distinct ones).

The product of its (nonzero) digits is 493920, while the sum is 45.

The spelling of 1440135172737 in words is "one trillion, four hundred forty billion, one hundred thirty-five million, one hundred seventy-two thousand, seven hundred thirty-seven".