78063581533 has 12 divisors (see below), whose sum is σ = 90830220480. Its totient is φ = 66895751832.

The previous prime is 78063581489. The next prime is 78063581539. The reversal of 78063581533 is 33518536087.

It is a happy number.

It is not a de Polignac number, because 78063581533 - 2¹⁷ = 78063450461 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (49).

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (78063581539) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 21660 + ... + 395722.

It is an arithmetic number, because the mean of its divisors is an integer number (7569185040).

Almost surely, 2^78063581533 is an apocalyptic number.

It is an amenable number.

78063581533 is a deficient number, since it is larger than the sum of its proper divisors (12766638947).

78063581533 is a wasteful number, since it uses less digits than its factorization.

78063581533 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 378336 (or 378329 counting only the distinct ones).

The product of its (nonzero) digits is 1814400, while the sum is 49.

The spelling of 78063581533 in words is "seventy-eight billion, sixty-three million, five hundred eighty-one thousand, five hundred thirty-three".