78834500641 has 8 divisors (see below), whose sum is σ = 84912435944. Its totient is φ = 72758528640.

The previous prime is 78834500629. The next prime is 78834500651. The reversal of 78834500641 is 14600543887.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 478734400 + 78355766241 = 21880^2 + 279921^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 78834500641 - 2⁷ = 78834500513 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 78834500591 and 78834500600.

It is not an unprimeable number, because it can be changed into a prime (78834500621) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 406890 + ... + 568531.

It is an arithmetic number, because the mean of its divisors is an integer number (10614054493).

Almost surely, 2^78834500641 is an apocalyptic number.

It is an amenable number.

78834500641 is a deficient number, since it is larger than the sum of its proper divisors (6077935303).

78834500641 is a wasteful number, since it uses less digits than its factorization.

78834500641 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 981651.

The product of its (nonzero) digits is 645120, while the sum is 46.

The spelling of 78834500641 in words is "seventy-eight billion, eight hundred thirty-four million, five hundred thousand, six hundred forty-one".