1675431641 has 4 divisors (see below), whose sum is σ = 1804311012. Its totient is φ = 1546552272.

The previous prime is 1675431629. The next prime is 1675431689. The reversal of 1675431641 is 1461345761.

It is a happy number.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 1461345761 = 47 ⋅31092463.

It can be written as a sum of positive squares in 2 ways, for example, as 348942400 + 1326489241 = 18680^2 + 36421^2 .

It is a cyclic number.

It is not a de Polignac number, because 1675431641 - 2⁶ = 1675431577 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 1675431595 and 1675431604.

It is not an unprimeable number, because it can be changed into a prime (1675401641) 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, 64439666 + ... + 64439691.

It is an arithmetic number, because the mean of its divisors is an integer number (451077753).

Almost surely, 2^1675431641 is an apocalyptic number.

It is an amenable number.

1675431641 is a deficient number, since it is larger than the sum of its proper divisors (128879371).

1675431641 is a wasteful number, since it uses less digits than its factorization.

1675431641 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 128879370.

The product of its digits is 60480, while the sum is 38.

The square root of 1675431641 is about 40932.0368537897. The cubic root of 1675431641 is about 1187.7058739054.

The spelling of 1675431641 in words is "one billion, six hundred seventy-five million, four hundred thirty-one thousand, six hundred forty-one".