78362215153 has 2 divisors, whose sum is σ = 78362215154. Its totient is φ = 78362215152.

The previous prime is 78362215111. The next prime is 78362215163. The reversal of 78362215153 is 35151226387.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 77923605904 + 438609249 = 279148^2 + 20943^2 .

It is an emirp because it is prime and its reverse (35151226387) is a distict prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-78362215153 is a prime.

It is a super-2 number, since 2×78362215153² (a number of 23 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (78362215163) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 39181107576 + 39181107577.

It is an arithmetic number, because the mean of its divisors is an integer number (39181107577).

Almost surely, 2^78362215153 is an apocalyptic number.

It is an amenable number.

78362215153 is a deficient number, since it is larger than the sum of its proper divisors (1).

78362215153 is an equidigital number, since it uses as much as digits as its factorization.

78362215153 is an evil number, because the sum of its binary digits is even.

The product of its digits is 302400, while the sum is 43.

The spelling of 78362215153 in words is "seventy-eight billion, three hundred sixty-two million, two hundred fifteen thousand, one hundred fifty-three".