78153532739 has 2 divisors, whose sum is σ = 78153532740. Its totient is φ = 78153532738.

The previous prime is 78153532711. The next prime is 78153532777. The reversal of 78153532739 is 93723535187.

It is a weak prime.

It is an emirp because it is prime and its reverse (93723535187) is a distict prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-78153532739 is a prime.

It is a super-2 number, since 2×78153532739² (a number of 23 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (78153532139) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 39076766369 + 39076766370.

It is an arithmetic number, because the mean of its divisors is an integer number (39076766370).

Almost surely, 2^78153532739 is an apocalyptic number.

78153532739 is a deficient number, since it is larger than the sum of its proper divisors (1).

78153532739 is an equidigital number, since it uses as much as digits as its factorization.

78153532739 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 4762800, while the sum is 53.

The spelling of 78153532739 in words is "seventy-eight billion, one hundred fifty-three million, five hundred thirty-two thousand, seven hundred thirty-nine".