78535741621834 has 64 divisors (see below), whose sum is σ = 137171186380800. Its totient is φ = 33029630117568.

The previous prime is 78535741621807. The next prime is 78535741621877. The reversal of 78535741621834 is 43812614753587.

It is a happy number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 692748847 + ... + 692862205.

It is an arithmetic number, because the mean of its divisors is an integer number (2143299787200).

Almost surely, 2^{78535741621834} is an apocalyptic number.

78535741621834 is a deficient number, since it is larger than the sum of its proper divisors (58635444758966).

78535741621834 is a wasteful number, since it uses less digits than its factorization.

78535741621834 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 117827.

The product of its digits is 135475200, while the sum is 64.

The spelling of 78535741621834 in words is "seventy-eight trillion, five hundred thirty-five billion, seven hundred forty-one million, six hundred twenty-one thousand, eight hundred thirty-four".