78255558602 has 16 divisors (see below), whose sum is σ = 130771889640. Its totient is φ = 34872503232.

The previous prime is 78255558581. The next prime is 78255558613. The reversal of 78255558602 is 20685555287.

It can be written as a sum of positive squares in 4 ways, for example, as 55511600881 + 22743957721 = 235609^2 + 150811^2 .

It is a super-2 number, since 2×78255558602² (a number of 23 digits) contains 22 as substring.

It is an unprimeable number.

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 7 ways as a sum of consecutive naturals, for example, 51892853 + ... + 51894360.

Almost surely, 2^78255558602 is an apocalyptic number.

78255558602 is a deficient number, since it is larger than the sum of its proper divisors (52516331038).

78255558602 is a wasteful number, since it uses less digits than its factorization.

78255558602 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 103787257.

The product of its (nonzero) digits is 6720000, while the sum is 53.

The spelling of 78255558602 in words is "seventy-eight billion, two hundred fifty-five million, five hundred fifty-eight thousand, six hundred two".