78363553097 has 2 divisors, whose sum is σ = 78363553098. Its totient is φ = 78363553096.

The previous prime is 78363553061. The next prime is 78363553201. The reversal of 78363553097 is 79035536387.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 66071617936 + 12291935161 = 257044^2 + 110869^2 .

It is a cyclic number.

It is not a de Polignac number, because 78363553097 - 2¹⁰ = 78363552073 is a prime.

It is a super-2 number, since 2×78363553097² (a number of 23 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (78363552097) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 39181776548 + 39181776549.

It is an arithmetic number, because the mean of its divisors is an integer number (39181776549).

Almost surely, 2^78363553097 is an apocalyptic number.

It is an amenable number.

78363553097 is a deficient number, since it is larger than the sum of its proper divisors (1).

78363553097 is an equidigital number, since it uses as much as digits as its factorization.

78363553097 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 14288400, while the sum is 56.

The spelling of 78363553097 in words is "seventy-eight billion, three hundred sixty-three million, five hundred fifty-three thousand, ninety-seven".