78401205982 has 16 divisors (see below), whose sum is σ = 135839523312. Its totient is φ = 33540622720.

The previous prime is 78401205919. The next prime is 78401206031. The reversal of 78401205982 is 28950210487.

It is a super-2 number, since 2×78401205982² (a number of 23 digits) contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 104814073 + ... + 104814820.

It is an arithmetic number, because the mean of its divisors is an integer number (8489970207).

Almost surely, 2^78401205982 is an apocalyptic number.

78401205982 is a deficient number, since it is larger than the sum of its proper divisors (57438317330).

78401205982 is a wasteful number, since it uses less digits than its factorization.

78401205982 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 209628923.

The product of its (nonzero) digits is 322560, while the sum is 46.

The spelling of 78401205982 in words is "seventy-eight billion, four hundred one million, two hundred five thousand, nine hundred eighty-two".