84781578156383 has 4 divisors (see below), whose sum is σ = 85391517567720. Its totient is φ = 84171638745048.

The previous prime is 84781578156371. The next prime is 84781578156409. The reversal of 84781578156383 is 38365187518748.

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 84781578156383 - 2¹⁰ = 84781578155359 is a prime.

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 84781578156383.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (84781578146383) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (31) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 304969705460 + ... + 304969705737.

It is an arithmetic number, because the mean of its divisors is an integer number (21347879391930).

Almost surely, 2^{84781578156383} is an apocalyptic number.

84781578156383 is a deficient number, since it is larger than the sum of its proper divisors (609939411337).

84781578156383 is a wasteful number, since it uses less digits than its factorization.

84781578156383 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 609939411336.

The product of its digits is 1083801600, while the sum is 74.

The spelling of 84781578156383 in words is "eighty-four trillion, seven hundred eighty-one billion, five hundred seventy-eight million, one hundred fifty-six thousand, three hundred eighty-three".