78133265739 has 28 divisors (see below), whose sum is σ = 117201078400. Its totient is φ = 52064491824.

The previous prime is 78133265729. The next prime is 78133265773. The reversal of 78133265739 is 93756233187.

It is not a de Polignac number, because 78133265739 - 2¹² = 78133261643 is a prime.

It is a super-3 number, since 3×78133265739³ (a number of 34 digits) contains 333 as substring. Note that it is a super-d number also for d = 2.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (78133265729) by changing a digit.

It is a polite number, since it can be written in 27 ways as a sum of consecutive naturals, for example, 1608297 + ... + 1656165.

It is an arithmetic number, because the mean of its divisors is an integer number (4185752800).

Almost surely, 2^78133265739 is an apocalyptic number.

78133265739 is a deficient number, since it is larger than the sum of its proper divisors (39067812661).

78133265739 is an equidigital number, since it uses as much as digits as its factorization.

78133265739 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 50126 (or 50111 counting only the distinct ones).

The product of its digits is 5715360, while the sum is 54.

The spelling of 78133265739 in words is "seventy-eight billion, one hundred thirty-three million, two hundred sixty-five thousand, seven hundred thirty-nine".