78115408982 has 16 divisors (see below), whose sum is σ = 126282008832. Its totient is φ = 36025957440.

The previous prime is 78115408927. The next prime is 78115409041. The reversal of 78115408982 is 28980451187.

It is a super-2 number, since 2×78115408982² (a number of 23 digits) contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

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 7 ways as a sum of consecutive naturals, for example, 1102838 + ... + 1171529.

It is an arithmetic number, because the mean of its divisors is an integer number (7892625552).

Almost surely, 2^78115408982 is an apocalyptic number.

78115408982 is a deficient number, since it is larger than the sum of its proper divisors (48166599850).

78115408982 is a wasteful number, since it uses less digits than its factorization.

78115408982 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2275703.

The product of its (nonzero) digits is 1290240, while the sum is 53.

The spelling of 78115408982 in words is "seventy-eight billion, one hundred fifteen million, four hundred eight thousand, nine hundred eighty-two".