78781059 has 32 divisors (see below), whose sum is σ = 133808640. Its totient is φ = 44875296.

The previous prime is 78781051. The next prime is 78781063. The reversal of 78781059 is 95018787.

It is not a de Polignac number, because 78781059 - 2³ = 78781051 is a prime.

It is a super-2 number, since 2×78781059² = 12412910514322962, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (78781051) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 98449 + ... + 99245.

It is an arithmetic number, because the mean of its divisors is an integer number (4181520).

Almost surely, 2^78781059 is an apocalyptic number.

78781059 is a deficient number, since it is larger than the sum of its proper divisors (55027581).

78781059 is a wasteful number, since it uses less digits than its factorization.

78781059 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1336 (or 1330 counting only the distinct ones).

The product of its (nonzero) digits is 141120, while the sum is 45.

The square root of 78781059 is about 8875.8694785356. The cubic root of 78781059 is about 428.6872873905.

The spelling of 78781059 in words is "seventy-eight million, seven hundred eighty-one thousand, fifty-nine".