78638833223830 has 32 divisors (see below), whose sum is σ = 159742833639840. Its totient is φ = 27609872478720.

The previous prime is 78638833223791. The next prime is 78638833223837. The reversal of 78638833223830 is 3832233883687.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (78638833223837) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 12325832739 + ... + 12325839118.

It is an arithmetic number, because the mean of its divisors is an integer number (4991963551245).

Almost surely, 2^{78638833223830} is an apocalyptic number.

78638833223830 is an abundant number, since it is smaller than the sum of its proper divisors (81104000416010).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

78638833223830 is a wasteful number, since it uses less digits than its factorization.

78638833223830 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 24651671904.

The product of its (nonzero) digits is 167215104, while the sum is 64.

The spelling of 78638833223830 in words is "seventy-eight trillion, six hundred thirty-eight billion, eight hundred thirty-three million, two hundred twenty-three thousand, eight hundred thirty".