1405145728745 has 16 divisors (see below), whose sum is σ = 1936277369280. Its totient is φ = 968138683200.

The previous prime is 1405145728667. The next prime is 1405145728769. The reversal of 1405145728745 is 5478275415041.

It is a happy number.

It is not a de Polignac number, because 1405145728745 - 2¹⁰ = 1405145727721 is a prime.

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, 672317486 + ... + 672319575.

It is an arithmetic number, because the mean of its divisors is an integer number (121017335580).

Almost surely, 2^{1405145728745} is an apocalyptic number.

It is an amenable number.

1405145728745 is a deficient number, since it is larger than the sum of its proper divisors (531131640535).

1405145728745 is a wasteful number, since it uses less digits than its factorization.

1405145728745 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1344637096.

The product of its (nonzero) digits is 6272000, while the sum is 53.

The spelling of 1405145728745 in words is "one trillion, four hundred five billion, one hundred forty-five million, seven hundred twenty-eight thousand, seven hundred forty-five".