1779978336436 has 12 divisors (see below), whose sum is σ = 3114981948960. Its totient is φ = 889983493880.

The previous prime is 1779978336431. The next prime is 1779978336439. The reversal of 1779978336436 is 6346338799771.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1779978336431) 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, 668746 + ... + 2001793.

It is an arithmetic number, because the mean of its divisors is an integer number (259581829080).

Almost surely, 2^{1779978336436} is an apocalyptic number.

It is an amenable number.

1779978336436 is a deficient number, since it is larger than the sum of its proper divisors (1335003612524).

1779978336436 is a wasteful number, since it uses less digits than its factorization.

1779978336436 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2837174 (or 2837172 counting only the distinct ones).

The product of its digits is 864162432, while the sum is 73.

The spelling of 1779978336436 in words is "one trillion, seven hundred seventy-nine billion, nine hundred seventy-eight million, three hundred thirty-six thousand, four hundred thirty-six".