80748692569 has 2 divisors, whose sum is σ = 80748692570. Its totient is φ = 80748692568.

The previous prime is 80748692539. The next prime is 80748692593. The reversal of 80748692569 is 96529684708.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 60417640000 + 20331052569 = 245800^2 + 142587^2 .

It is a cyclic number.

It is not a de Polignac number, because 80748692569 - 2²⁵ = 80715138137 is a prime.

It is a super-2 number, since 2×80748692569² (a number of 23 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 80748692569.

It is not a weakly prime, because it can be changed into another prime (80748692539) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 40374346284 + 40374346285.

It is an arithmetic number, because the mean of its divisors is an integer number (40374346285).

Almost surely, 2^80748692569 is an apocalyptic number.

It is an amenable number.

80748692569 is a deficient number, since it is larger than the sum of its proper divisors (1).

80748692569 is an equidigital number, since it uses as much as digits as its factorization.

80748692569 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 52254720, while the sum is 64.

The spelling of 80748692569 in words is "eighty billion, seven hundred forty-eight million, six hundred ninety-two thousand, five hundred sixty-nine".