1641625033 has 4 divisors (see below), whose sum is σ = 1648670868. Its totient is φ = 1634579200.

The previous prime is 1641625031. The next prime is 1641625049. The reversal of 1641625033 is 3305261461.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 191767104 + 1449857929 = 13848^2 + 38077^2 .

It is a cyclic number.

It is not a de Polignac number, because 1641625033 - 2¹ = 1641625031 is a prime.

It is a Smith number, since the sum of its digits (31) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 1641624986 and 1641625004.

It is not an unprimeable number, because it can be changed into a prime (1641625031) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3522568 + ... + 3523033.

It is an arithmetic number, because the mean of its divisors is an integer number (412167717).

Almost surely, 2^1641625033 is an apocalyptic number.

It is an amenable number.

1641625033 is a deficient number, since it is larger than the sum of its proper divisors (7045835).

1641625033 is an equidigital number, since it uses as much as digits as its factorization.

1641625033 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7045834.

The product of its (nonzero) digits is 12960, while the sum is 31.

The square root of 1641625033 is about 40516.9721598246. The cubic root of 1641625033 is about 1179.6630832142.

Adding to 1641625033 its reverse (3305261461), we get a palindrome (4946886494).

The spelling of 1641625033 in words is "one billion, six hundred forty-one million, six hundred twenty-five thousand, thirty-three".