8728403433377 has 8 divisors (see below), whose sum is σ = 9241964564616. Its totient is φ = 8214856261632.

The previous prime is 8728403433331. The next prime is 8728403433509. The reversal of 8728403433377 is 7733343048278.

It can be written as a sum of positive squares in 4 ways, for example, as 1880844930721 + 6847558502656 = 1371439^2 + 2616784^2 .

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 8728403433377 - 2⁴² = 4330356922273 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (8728403433307) 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, 2188688 + ... + 4716689.

It is an arithmetic number, because the mean of its divisors is an integer number (1155245570577).

Almost surely, 2^{8728403433377} is an apocalyptic number.

It is an amenable number.

8728403433377 is a deficient number, since it is larger than the sum of its proper divisors (513561131239).

8728403433377 is a wasteful number, since it uses less digits than its factorization.

8728403433377 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6979747.

The product of its (nonzero) digits is 56899584, while the sum is 59.

The spelling of 8728403433377 in words is "eight trillion, seven hundred twenty-eight billion, four hundred three million, four hundred thirty-three thousand, three hundred seventy-seven".