1785405045 has 16 divisors (see below), whose sum is σ = 2857407552. Its totient is φ = 951962880.

The previous prime is 1785405043. The next prime is 1785405047. The reversal of 1785405045 is 5405045871.

It is an interprime number because it is at equal distance from previous prime (1785405043) and next prime (1785405047).

It is not a de Polignac number, because 1785405045 - 2¹ = 1785405043 is a prime.

It is a super-2 number, since 2×1785405045² = 6375342349422904050, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 1785404994 and 1785405012.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1785405043) 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, 51805 + ... + 79085.

It is an arithmetic number, because the mean of its divisors is an integer number (178587972).

Almost surely, 2^1785405045 is an apocalyptic number.

1785405045 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

1785405045 is a deficient number, since it is larger than the sum of its proper divisors (1072002507).

1785405045 is a wasteful number, since it uses less digits than its factorization.

1785405045 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 31652.

The product of its (nonzero) digits is 112000, while the sum is 39.

The square root of 1785405045 is about 42254.0535925253. The cubic root of 1785405045 is about 1213.1437148753.

The spelling of 1785405045 in words is "one billion, seven hundred eighty-five million, four hundred five thousand, forty-five".