78316987153 has 2 divisors, whose sum is σ = 78316987154. Its totient is φ = 78316987152.

The previous prime is 78316987103. The next prime is 78316987181. The reversal of 78316987153 is 35178961387.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 47294505729 + 31022481424 = 217473^2 + 176132^2 .

It is a cyclic number.

It is not a de Polignac number, because 78316987153 - 2²¹ = 78314890001 is a prime.

It is a super-2 number, since 2×78316987153² (a number of 23 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (78316987103) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 39158493576 + 39158493577.

It is an arithmetic number, because the mean of its divisors is an integer number (39158493577).

Almost surely, 2^78316987153 is an apocalyptic number.

It is an amenable number.

78316987153 is a deficient number, since it is larger than the sum of its proper divisors (1).

78316987153 is an equidigital number, since it uses as much as digits as its factorization.

78316987153 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 7620480, while the sum is 58.

The spelling of 78316987153 in words is "seventy-eight billion, three hundred sixteen million, nine hundred eighty-seven thousand, one hundred fifty-three".