78048051821 has 8 divisors (see below), whose sum is σ = 80659113984. Its totient is φ = 75442826160.

The previous prime is 78048051797. The next prime is 78048051871. The reversal of 78048051821 is 12815084087.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 78048051821 - 2¹⁰ = 78048050797 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (78048051871) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1431926 + ... + 1485431.

It is an arithmetic number, because the mean of its divisors is an integer number (10082389248).

Almost surely, 2^78048051821 is an apocalyptic number.

It is an amenable number.

78048051821 is a deficient number, since it is larger than the sum of its proper divisors (2611062163).

78048051821 is a wasteful number, since it uses less digits than its factorization.

78048051821 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2918251.

The product of its (nonzero) digits is 143360, while the sum is 44.

The spelling of 78048051821 in words is "seventy-eight billion, forty-eight million, fifty-one thousand, eight hundred twenty-one".