1745157905 has 4 divisors (see below), whose sum is σ = 2094189492. Its totient is φ = 1396126320.

The previous prime is 1745157889. The next prime is 1745157979. The reversal of 1745157905 is 5097515471.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 5097515471 = 51449 ⋅99079.

It can be written as a sum of positive squares in 2 ways, for example, as 820937104 + 924220801 = 28652^2 + 30401^2 .

It is not a de Polignac number, because 1745157905 - 2⁴ = 1745157889 is a prime.

It is a super-2 number, since 2×1745157905² = 6091152226767978050, which contains 22 as substring.

It is a Duffinian number.

It is a Curzon number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 174515786 + ... + 174515795.

It is an arithmetic number, because the mean of its divisors is an integer number (523547373).

Almost surely, 2^1745157905 is an apocalyptic number.

It is an amenable number.

1745157905 is a deficient number, since it is larger than the sum of its proper divisors (349031587).

1745157905 is an equidigital number, since it uses as much as digits as its factorization.

1745157905 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 349031586.

The product of its (nonzero) digits is 220500, while the sum is 44.

The square root of 1745157905 is about 41775.0871333622. The cubic root of 1745157905 is about 1203.9586637262.

The spelling of 1745157905 in words is "one billion, seven hundred forty-five million, one hundred fifty-seven thousand, nine hundred five".