501378081443 has 4 divisors (see below), whose sum is σ = 505325940480. Its totient is φ = 497430222408.

The previous prime is 501378081439. The next prime is 501378081467. The reversal of 501378081443 is 344180873105.

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

It is a cyclic number.

It is not a de Polignac number, because 501378081443 - 2² = 501378081439 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 501378081394 and 501378081403.

It is not an unprimeable number, because it can be changed into a prime (501378081433) 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, 1973929328 + ... + 1973929581.

It is an arithmetic number, because the mean of its divisors is an integer number (126331485120).

Almost surely, 2^501378081443 is an apocalyptic number.

501378081443 is a deficient number, since it is larger than the sum of its proper divisors (3947859037).

501378081443 is a wasteful number, since it uses less digits than its factorization.

501378081443 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3947859036.

The product of its (nonzero) digits is 322560, while the sum is 44.

The spelling of 501378081443 in words is "five hundred one billion, three hundred seventy-eight million, eighty-one thousand, four hundred forty-three".