78077564929 has 16 divisors (see below), whose sum is σ = 101748140928. Its totient is φ = 58141792512.

The previous prime is 78077564927. The next prime is 78077564969. The reversal of 78077564929 is 92946577087.

It is a cyclic number.

It is not a de Polignac number, because 78077564929 - 2¹ = 78077564927 is a prime.

It is a super-2 number, since 2×78077564929² (a number of 23 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (78077564927) 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 in 15 ways as a sum of consecutive naturals, for example, 25233607 + ... + 25236700.

It is an arithmetic number, because the mean of its divisors is an integer number (6359258808).

Almost surely, 2^78077564929 is an apocalyptic number.

It is an amenable number.

78077564929 is a deficient number, since it is larger than the sum of its proper divisors (23670575999).

78077564929 is a wasteful number, since it uses less digits than its factorization.

78077564929 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 50470344.

The product of its (nonzero) digits is 53343360, while the sum is 64.

The spelling of 78077564929 in words is "seventy-eight billion, seventy-seven million, five hundred sixty-four thousand, nine hundred twenty-nine".