78506653505722 has 8 divisors (see below), whose sum is σ = 126818440278516. Its totient is φ = 36233840079552.

The previous prime is 78506653505561. The next prime is 78506653505743. The reversal of 78506653505722 is 22750535660587.

It can be written as a sum of positive squares in 2 ways, for example, as 77895081020761 + 611572484961 = 8825819^2 + 782031^2 .

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

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1509743336623 + ... + 1509743336674.

Almost surely, 2^{78506653505722} is an apocalyptic number.

78506653505722 is a deficient number, since it is larger than the sum of its proper divisors (48311786772794).

78506653505722 is a wasteful number, since it uses less digits than its factorization.

78506653505722 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3019486673312.

The product of its (nonzero) digits is 105840000, while the sum is 61.

The spelling of 78506653505722 in words is "seventy-eight trillion, five hundred six billion, six hundred fifty-three million, five hundred five thousand, seven hundred twenty-two".