1645725093 has 8 divisors (see below), whose sum is σ = 2199103488. Its totient is φ = 1094748384.

The previous prime is 1645725083. The next prime is 1645725119. The reversal of 1645725093 is 3905275461.

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

It is not a de Polignac number, because 1645725093 - 2⁵ = 1645725061 is a prime.

It is a super-2 number, since 2×1645725093² = 5416822163459717298, which contains 22 as substring.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1645725013) 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, 598821 + ... + 601562.

It is an arithmetic number, because the mean of its divisors is an integer number (274887936).

Almost surely, 2^1645725093 is an apocalyptic number.

It is an amenable number.

1645725093 is a deficient number, since it is larger than the sum of its proper divisors (553378395).

1645725093 is a wasteful number, since it uses less digits than its factorization.

1645725093 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1200843.

The product of its (nonzero) digits is 226800, while the sum is 42.

The square root of 1645725093 is about 40567.5374283429. The cubic root of 1645725093 is about 1180.6443605579.

The spelling of 1645725093 in words is "one billion, six hundred forty-five million, seven hundred twenty-five thousand, ninety-three".