78633081 has 12 divisors (see below), whose sum is σ = 117245440. Its totient is φ = 50730840.

The previous prime is 78633031. The next prime is 78633091. The reversal of 78633081 is 18033687.

It is not a de Polignac number, because 78633081 - 2¹⁴ = 78616697 is a prime.

It is a super-2 number, since 2×78633081² = 12366322855105122, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (78633011) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 140641 + ... + 141198.

Almost surely, 2^78633081 is an apocalyptic number.

It is an amenable number.

78633081 is a deficient number, since it is larger than the sum of its proper divisors (38612359).

78633081 is a wasteful number, since it uses less digits than its factorization.

78633081 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 281876 (or 281873 counting only the distinct ones).

The product of its (nonzero) digits is 24192, while the sum is 36.

The square root of 78633081 is about 8867.5295883352. The cubic root of 78633081 is about 428.4187116350.

The spelling of 78633081 in words is "seventy-eight million, six hundred thirty-three thousand, eighty-one".