78339694633 has 2 divisors, whose sum is σ = 78339694634. Its totient is φ = 78339694632.

The previous prime is 78339694621. The next prime is 78339694681. The reversal of 78339694633 is 33649693387.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 77575061529 + 764633104 = 278523^2 + 27652^2 .

It is a cyclic number.

It is not a de Polignac number, because 78339694633 - 2¹³ = 78339686441 is a prime.

It is a super-2 number, since 2×78339694633² (a number of 23 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (78339664633) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 39169847316 + 39169847317.

It is an arithmetic number, because the mean of its divisors is an integer number (39169847317).

Almost surely, 2^78339694633 is an apocalyptic number.

It is an amenable number.

78339694633 is a deficient number, since it is larger than the sum of its proper divisors (1).

78339694633 is an equidigital number, since it uses as much as digits as its factorization.

78339694633 is an evil number, because the sum of its binary digits is even.

The product of its digits is 52907904, while the sum is 61.

The spelling of 78339694633 in words is "seventy-eight billion, three hundred thirty-nine million, six hundred ninety-four thousand, six hundred thirty-three".