1641797073 has 32 divisors (see below), whose sum is σ = 2786891520. Its totient is φ = 935763840.

The previous prime is 1641797023. The next prime is 1641797077. The reversal of 1641797073 is 3707971461.

It is a happy number.

It is not a de Polignac number, because 1641797073 - 2⁶ = 1641797009 is a prime.

It is a super-2 number, since 2×1641797073² = 5390995257822734658, which contains 22 as substring.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (1641797077) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 64093 + ... + 85973.

It is an arithmetic number, because the mean of its divisors is an integer number (87090360).

Almost surely, 2^1641797073 is an apocalyptic number.

It is an amenable number.

1641797073 is a deficient number, since it is larger than the sum of its proper divisors (1145094447).

1641797073 is a wasteful number, since it uses less digits than its factorization.

1641797073 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 22294 (or 22288 counting only the distinct ones).

The product of its (nonzero) digits is 222264, while the sum is 45.

The square root of 1641797073 is about 40519.0951651194. The cubic root of 1641797073 is about 1179.7042907867.

The spelling of 1641797073 in words is "one billion, six hundred forty-one million, seven hundred ninety-seven thousand, seventy-three".