78508565003 has 16 divisors (see below), whose sum is σ = 90811463040. Its totient is φ = 67121467200.

The previous prime is 78508564999. The next prime is 78508565021. The reversal of 78508565003 is 30056580587.

It is not a de Polignac number, because 78508565003 - 2² = 78508564999 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (78508565503) 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 15 ways as a sum of consecutive naturals, for example, 1342313 + ... + 1399578.

It is an arithmetic number, because the mean of its divisors is an integer number (5675716440).

Almost surely, 2^78508565003 is an apocalyptic number.

78508565003 is a deficient number, since it is larger than the sum of its proper divisors (12302898037).

78508565003 is a wasteful number, since it uses less digits than its factorization.

78508565003 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2742058.

The product of its (nonzero) digits is 1008000, while the sum is 47.

The spelling of 78508565003 in words is "seventy-eight billion, five hundred eight million, five hundred sixty-five thousand, three".