1641473645 has 8 divisors (see below), whose sum is σ = 2251163904. Its totient is φ = 1125581904.

The previous prime is 1641473629. The next prime is 1641473681. The reversal of 1641473645 is 5463741461.

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 1641473645 - 2⁴ = 1641473629 is a prime.

It is a super-3 number, since 3×1641473645³ (a number of 29 digits) contains 333 as substring.

It is a Duffinian number.

It is a congruent number.

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, 23449589 + ... + 23449658.

It is an arithmetic number, because the mean of its divisors is an integer number (281395488).

Almost surely, 2^1641473645 is an apocalyptic number.

It is an amenable number.

1641473645 is a deficient number, since it is larger than the sum of its proper divisors (609690259).

1641473645 is an equidigital number, since it uses as much as digits as its factorization.

1641473645 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 46899259.

The product of its digits is 241920, while the sum is 41.

The square root of 1641473645 is about 40515.1039119981. The cubic root of 1641473645 is about 1179.6268198936.

The spelling of 1641473645 in words is "one billion, six hundred forty-one million, four hundred seventy-three thousand, six hundred forty-five".