78180601 has 2 divisors, whose sum is σ = 78180602. Its totient is φ = 78180600.

The previous prime is 78180581. The next prime is 78180617. The reversal of 78180601 is 10608187.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 52577001 + 25603600 = 7251^2 + 5060^2 .

It is a cyclic number.

It is not a de Polignac number, because 78180601 - 2¹⁵ = 78147833 is a prime.

It is a super-2 number, since 2×78180601² = 12224412745442402, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (78180701) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 39090300 + 39090301.

It is an arithmetic number, because the mean of its divisors is an integer number (39090301).

Almost surely, 2^78180601 is an apocalyptic number.

It is an amenable number.

78180601 is a deficient number, since it is larger than the sum of its proper divisors (1).

78180601 is an equidigital number, since it uses as much as digits as its factorization.

78180601 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 2688, while the sum is 31.

The square root of 78180601 is about 8841.9794729461. The cubic root of 78180601 is about 427.5953774174.

Adding to 78180601 its reverse (10608187), we get a palindrome (88788788).

The spelling of 78180601 in words is "seventy-eight million, one hundred eighty thousand, six hundred one".