1641795431 has 16 divisors (see below), whose sum is σ = 1701127008. Its totient is φ = 1583500800.

The previous prime is 1641795401. The next prime is 1641795437. The reversal of 1641795431 is 1345971461.

It is a cyclic number.

It is not a de Polignac number, because 1641795431 - 2¹⁴ = 1641779047 is a prime.

It is a super-2 number, since 2×1641795431² = 5390984474504951522, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (41).

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1641795437) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1496075 + ... + 1497171.

It is an arithmetic number, because the mean of its divisors is an integer number (106320438).

Almost surely, 2^1641795431 is an apocalyptic number.

1641795431 is a deficient number, since it is larger than the sum of its proper divisors (59331577).

1641795431 is a wasteful number, since it uses less digits than its factorization.

1641795431 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1522.

The product of its digits is 90720, while the sum is 41.

The square root of 1641795431 is about 40519.0749030626. The cubic root of 1641795431 is about 1179.7038975032.

The spelling of 1641795431 in words is "one billion, six hundred forty-one million, seven hundred ninety-five thousand, four hundred thirty-one".