1645075265 has 8 divisors (see below), whose sum is σ = 1975585920. Its totient is φ = 1315063152.

The previous prime is 1645075231. The next prime is 1645075277. The reversal of 1645075265 is 5625705461.

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

It is a cyclic number.

It is not a de Polignac number, because 1645075265 - 2¹⁴ = 1645058881 is a prime.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 117335 + ... + 130604.

It is an arithmetic number, because the mean of its divisors is an integer number (246948240).

Almost surely, 2^1645075265 is an apocalyptic number.

It is an amenable number.

1645075265 is a deficient number, since it is larger than the sum of its proper divisors (330510655).

1645075265 is a wasteful number, since it uses less digits than its factorization.

1645075265 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 249271.

The product of its (nonzero) digits is 252000, while the sum is 41.

The square root of 1645075265 is about 40559.5274257479. The cubic root of 1645075265 is about 1180.4889444095.

The spelling of 1645075265 in words is "one billion, six hundred forty-five million, seventy-five thousand, two hundred sixty-five".