78403753783949 has 8 divisors (see below), whose sum is σ = 85531689892800. Its totient is φ = 71275871363200.

The previous prime is 78403753783921. The next prime is 78403753783963. The reversal of 78403753783949 is 94938735730487.

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 78403753783949 - 2⁴⁰ = 77304242156173 is a prime.

It is a super-2 number, since 2×78403753783949² (a number of 29 digits) contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 78403753783949.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (78403753483949) 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, 10337732 + ... + 16238109.

It is an arithmetic number, because the mean of its divisors is an integer number (10691461236600).

Almost surely, 2^{78403753783949} is an apocalyptic number.

It is an amenable number.

78403753783949 is a deficient number, since it is larger than the sum of its proper divisors (7127936108851).

78403753783949 is a wasteful number, since it uses less digits than its factorization.

78403753783949 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 26844051.

The product of its (nonzero) digits is 3840721920, while the sum is 77.

The spelling of 78403753783949 in words is "seventy-eight trillion, four hundred three billion, seven hundred fifty-three million, seven hundred eighty-three thousand, nine hundred forty-nine".