1831646401 has 4 divisors (see below), whose sum is σ = 1972542292. Its totient is φ = 1690750512.

The previous prime is 1831646393. The next prime is 1831646449. The reversal of 1831646401 is 1046461381.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 1046461381 = 7 ⋅149494483.

It can be written as a sum of positive squares in 2 ways, for example, as 338596801 + 1493049600 = 18401^2 + 38640^2 .

It is a cyclic number.

It is not a de Polignac number, because 1831646401 - 2³ = 1831646393 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1831646461) 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, 70447926 + ... + 70447951.

It is an arithmetic number, because the mean of its divisors is an integer number (493135573).

Almost surely, 2^1831646401 is an apocalyptic number.

It is an amenable number.

1831646401 is a deficient number, since it is larger than the sum of its proper divisors (140895891).

1831646401 is a wasteful number, since it uses less digits than its factorization.

1831646401 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 140895890.

The product of its (nonzero) digits is 13824, while the sum is 34.

The square root of 1831646401 is about 42797.7382696796. The cubic root of 1831646401 is about 1223.5279056478.

The spelling of 1831646401 in words is "one billion, eight hundred thirty-one million, six hundred forty-six thousand, four hundred one".