78412880529 has 27 divisors (see below), whose sum is σ = 117073437897. Its totient is φ = 50572153800.

The previous prime is 78412880503. The next prime is 78412880531. The reversal of 78412880529 is 92508821487.

The square root of 78412880529 is 280023.

It is a perfect power (a square), and thus also a powerful number.

78412880529 is a `hidden beast` number, since 78 + 41 + 2 + 8 + 8 + 0 + 529 = 666.

It is not a de Polignac number, because 78412880529 - 2⁷ = 78412880401 is a prime.

It is a super-2 number, since 2×78412880529² (a number of 23 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (78412880929) by changing a digit.

It is a polite number, since it can be written in 26 ways as a sum of consecutive naturals, for example, 26040634 + ... + 26043644.

Almost surely, 2^78412880529 is an apocalyptic number.

78412880529 is the 280023-rd square number.

78412880529 is the 140012-nd centered octagonal number.

It is an amenable number.

78412880529 is a deficient number, since it is larger than the sum of its proper divisors (38660557368).

78412880529 is an frugal number, since it uses more digits than its factorization.

78412880529 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6090 (or 3045 counting only the distinct ones).

The product of its (nonzero) digits is 2580480, while the sum is 54.

The spelling of 78412880529 in words is "seventy-eight billion, four hundred twelve million, eight hundred eighty thousand, five hundred twenty-nine".