78145551220343 has 4 divisors (see below), whose sum is σ = 78148580965488. Its totient is φ = 78142521475200.

The previous prime is 78145551220313. The next prime is 78145551220349. The reversal of 78145551220343 is 34302215554187.

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

It is a cyclic number.

It is not a de Polignac number, because 78145551220343 - 2⁶ = 78145551220279 is a prime.

It is a super-2 number, since 2×78145551220343² (a number of 29 digits) contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 78145551220291 and 78145551220300.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (78145551220349) 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, 1514833883 + ... + 1514885468.

It is an arithmetic number, because the mean of its divisors is an integer number (19537145241372).

Almost surely, 2^{78145551220343} is an apocalyptic number.

78145551220343 is a deficient number, since it is larger than the sum of its proper divisors (3029745145).

78145551220343 is a wasteful number, since it uses less digits than its factorization.

78145551220343 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3029745144.

The product of its (nonzero) digits is 4032000, while the sum is 50.

The spelling of 78145551220343 in words is "seventy-eight trillion, one hundred forty-five billion, five hundred fifty-one million, two hundred twenty thousand, three hundred forty-three".