78272025529 has 32 divisors (see below), whose sum is σ = 84783542400. Its totient is φ = 72034997760.

The previous prime is 78272025479. The next prime is 78272025547. The reversal of 78272025529 is 92552027287.

It is a cyclic number.

It is not a de Polignac number, because 78272025529 - 2⁹ = 78272025017 is a prime.

It is a super-2 number, since 2×78272025529² (a number of 23 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (78272025589) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 61293039 + ... + 61294315.

It is an arithmetic number, because the mean of its divisors is an integer number (2649485700).

Almost surely, 2^78272025529 is an apocalyptic number.

It is an amenable number.

78272025529 is a deficient number, since it is larger than the sum of its proper divisors (6511516871).

78272025529 is a wasteful number, since it uses less digits than its factorization.

78272025529 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1993.

The product of its (nonzero) digits is 1411200, while the sum is 49.

The spelling of 78272025529 in words is "seventy-eight billion, two hundred seventy-two million, twenty-five thousand, five hundred twenty-nine".