1645361085 has 8 divisors (see below), whose sum is σ = 2632577760. Its totient is φ = 877525904.

The previous prime is 1645361059. The next prime is 1645361087. The reversal of 1645361085 is 5801635461.

1645361085 is digitally balanced in base 4, because in such base it contains all the possibile digits an equal number of times.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1645361085 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1645361087) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 54845355 + ... + 54845384.

It is an arithmetic number, because the mean of its divisors is an integer number (329072220).

Almost surely, 2^1645361085 is an apocalyptic number.

1645361085 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

1645361085 is a deficient number, since it is larger than the sum of its proper divisors (987216675).

1645361085 is a wasteful number, since it uses less digits than its factorization.

1645361085 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 109690747.

The product of its (nonzero) digits is 86400, while the sum is 39.

The square root of 1645361085 is about 40563.0507358606. The cubic root of 1645361085 is about 1180.5573076061.

The spelling of 1645361085 in words is "one billion, six hundred forty-five million, three hundred sixty-one thousand, eighty-five".