78758103253 has 4 divisors (see below), whose sum is σ = 78762039148. Its totient is φ = 78754167360.

The previous prime is 78758103247. The next prime is 78758103329. The reversal of 78758103253 is 35230185787.

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

It can be written as a sum of positive squares in 2 ways, for example, as 40247180689 + 38510922564 = 200617^2 + 196242^2 .

It is a cyclic number.

It is not a de Polignac number, because 78758103253 - 2¹³ = 78758095061 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 78758103197 and 78758103206.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (78758103953) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1937778 + ... + 1978003.

It is an arithmetic number, because the mean of its divisors is an integer number (19690509787).

Almost surely, 2^78758103253 is an apocalyptic number.

It is an amenable number.

78758103253 is a deficient number, since it is larger than the sum of its proper divisors (3935895).

78758103253 is a wasteful number, since it uses less digits than its factorization.

78758103253 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3935894.

The product of its (nonzero) digits is 1411200, while the sum is 49.

The spelling of 78758103253 in words is "seventy-eight billion, seven hundred fifty-eight million, one hundred three thousand, two hundred fifty-three".