78782477683128 has 32 divisors (see below), whose sum is σ = 197801499776400. Its totient is φ = 26148118485248.

The previous prime is 78782477683121. The next prime is 78782477683243. The reversal of 78782477683128 is 82138677428787.

It is a super-2 number, since 2×78782477683128² (a number of 29 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (78782477683121) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 7044207363 + ... + 7044218546.

Almost surely, 2^{78782477683128} is an apocalyptic number.

It is an amenable number.

78782477683128 is an abundant number, since it is smaller than the sum of its proper divisors (119019022093272).

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

78782477683128 is a wasteful number, since it uses less digits than its factorization.

78782477683128 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 14088426151 (or 14088426147 counting only the distinct ones).

The product of its digits is 2832334848, while the sum is 78.

The spelling of 78782477683128 in words is "seventy-eight trillion, seven hundred eighty-two billion, four hundred seventy-seven million, six hundred eighty-three thousand, one hundred twenty-eight".