75977678017 has 2 divisors, whose sum is σ = 75977678018. Its totient is φ = 75977678016.

The previous prime is 75977678003. The next prime is 75977678033. The reversal of 75977678017 is 71087677957.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 41337395856 + 34640282161 = 203316^2 + 186119^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-75977678017 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 75977678017.

It is not a weakly prime, because it can be changed into another prime (75977678717) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 37988839008 + 37988839009.

It is an arithmetic number, because the mean of its divisors is an integer number (37988839009).

Almost surely, 2^75977678017 is an apocalyptic number.

It is an amenable number.

75977678017 is a deficient number, since it is larger than the sum of its proper divisors (1).

75977678017 is an equidigital number, since it uses as much as digits as its factorization.

75977678017 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 36303120, while the sum is 64.

The spelling of 75977678017 in words is "seventy-five billion, nine hundred seventy-seven million, six hundred seventy-eight thousand, seventeen".