431661042136403 has 2 divisors, whose sum is σ = 431661042136404. Its totient is φ = 431661042136402.

The previous prime is 431661042136393. The next prime is 431661042136409. The reversal of 431661042136403 is 304631240166134.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 431661042136403 - 2¹⁴ = 431661042120019 is a prime.

It is not a weakly prime, because it can be changed into another prime (431661042136409) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 215830521068201 + 215830521068202.

It is an arithmetic number, because the mean of its divisors is an integer number (215830521068202).

Almost surely, 2^{431661042136403} is an apocalyptic number.

431661042136403 is a deficient number, since it is larger than the sum of its proper divisors (1).

431661042136403 is an equidigital number, since it uses as much as digits as its factorization.

431661042136403 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 746496, while the sum is 44.

The spelling of 431661042136403 in words is "four hundred thirty-one trillion, six hundred sixty-one billion, forty-two million, one hundred thirty-six thousand, four hundred three".