78045939039561 has 8 divisors (see below), whose sum is σ = 104246085540000. Its totient is φ = 51938209282752.

The previous prime is 78045939039559. The next prime is 78045939039569. The reversal of 78045939039561 is 16593093954087.

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

It is not a de Polignac number, because 78045939039561 - 2¹ = 78045939039559 is a prime.

It is not an unprimeable number, because it can be changed into a prime (78045939039569) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (29) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 23104183936 + ... + 23104187313.

It is an arithmetic number, because the mean of its divisors is an integer number (13030760692500).

Almost surely, 2^{78045939039561} is an apocalyptic number.

It is an amenable number.

78045939039561 is a deficient number, since it is larger than the sum of its proper divisors (26200146500439).

78045939039561 is a wasteful number, since it uses less digits than its factorization.

78045939039561 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 46208371815.

The product of its (nonzero) digits is 220449600, while the sum is 69.

The spelling of 78045939039561 in words is "seventy-eight trillion, forty-five billion, nine hundred thirty-nine million, thirty-nine thousand, five hundred sixty-one".