78381651100 has 36 divisors (see below), whose sum is σ = 172876527208. Its totient is φ = 30838680000.

The previous prime is 78381651097. The next prime is 78381651133. The reversal of 78381651100 is 115618387.

It is a super-2 number, since 2×78381651100² (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 (19) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 6418626 + ... + 6430825.

Almost surely, 2^78381651100 is an apocalyptic number.

It is an amenable number.

78381651100 is an abundant number, since it is smaller than the sum of its proper divisors (94494876108).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

78381651100 is a wasteful number, since it uses less digits than its factorization.

78381651100 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12849526 (or 12849519 counting only the distinct ones).

The product of its (nonzero) digits is 40320, while the sum is 40.

The spelling of 78381651100 in words is "seventy-eight billion, three hundred eighty-one million, six hundred fifty-one thousand, one hundred".