78128255051383 has 8 divisors (see below), whose sum is σ = 82240371140400. Its totient is φ = 74016149228928.

The previous prime is 78128255051263. The next prime is 78128255051563. The reversal of 78128255051383 is 38315055282187.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-78128255051383 is a prime.

It is a super-2 number, since 2×78128255051383² (a number of 29 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (78128255051983) 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, 16801413 + ... + 20941441.

It is an arithmetic number, because the mean of its divisors is an integer number (10280046392550).

Almost surely, 2^{78128255051383} is an apocalyptic number.

78128255051383 is a deficient number, since it is larger than the sum of its proper divisors (4112116089017).

78128255051383 is a wasteful number, since it uses less digits than its factorization.

78128255051383 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5133281.

The product of its (nonzero) digits is 16128000, while the sum is 58.

The spelling of 78128255051383 in words is "seventy-eight trillion, one hundred twenty-eight billion, two hundred fifty-five million, fifty-one thousand, three hundred eighty-three".