1785728100145 has 16 divisors (see below), whose sum is σ = 2340977624640. Its totient is φ = 1296879566400.

The previous prime is 1785728100127. The next prime is 1785728100173. The reversal of 1785728100145 is 5410018275871.

It is not a de Polignac number, because 1785728100145 - 2⁹ = 1785728099633 is a prime.

It is a super-2 number, since 2×1785728100145² (a number of 25 digits) contains 22 as substring.

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, 22857891 + ... + 22935880.

It is an arithmetic number, because the mean of its divisors is an integer number (146311101540).

Almost surely, 2^{1785728100145} is an apocalyptic number.

It is an amenable number.

1785728100145 is a deficient number, since it is larger than the sum of its proper divisors (555249524495).

1785728100145 is a wasteful number, since it uses less digits than its factorization.

1785728100145 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 45794496.

The product of its (nonzero) digits is 627200, while the sum is 49.

The spelling of 1785728100145 in words is "one trillion, seven hundred eighty-five billion, seven hundred twenty-eight million, one hundred thousand, one hundred forty-five".