78720512147077 has 8 divisors (see below), whose sum is σ = 79034038372800. Its totient is φ = 78407592943680.

The previous prime is 78720512147063. The next prime is 78720512147099. The reversal of 78720512147077 is 77074121502787.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-78720512147077 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (78720512147177) 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, 151495699 + ... + 152014432.

It is an arithmetic number, because the mean of its divisors is an integer number (9879254796600).

Almost surely, 2^{78720512147077} is an apocalyptic number.

It is an amenable number.

78720512147077 is a deficient number, since it is larger than the sum of its proper divisors (313526225723).

78720512147077 is a wasteful number, since it uses less digits than its factorization.

78720512147077 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 303511163.

The product of its (nonzero) digits is 10756480, while the sum is 58.

The spelling of 78720512147077 in words is "seventy-eight trillion, seven hundred twenty billion, five hundred twelve million, one hundred forty-seven thousand, seventy-seven".