78505353 has 24 divisors (see below), whose sum is σ = 116141376. Its totient is φ = 51084000.

The previous prime is 78505351. The next prime is 78505363. The reversal of 78505353 is 35350587.

78505353 is a `hidden beast` number, since 78 + 50 + 535 + 3 = 666.

It is not a de Polignac number, because 78505353 - 2¹ = 78505351 is a prime.

It is not an unprimeable number, because it can be changed into a prime (78505351) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 82426 + ... + 83372.

It is an arithmetic number, because the mean of its divisors is an integer number (4839224).

Almost surely, 2^78505353 is an apocalyptic number.

It is an amenable number.

78505353 is a deficient number, since it is larger than the sum of its proper divisors (37636023).

78505353 is a wasteful number, since it uses less digits than its factorization.

78505353 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1165 (or 1162 counting only the distinct ones).

The product of its (nonzero) digits is 63000, while the sum is 36.

The square root of 78505353 is about 8860.3246554514. The cubic root of 78505353 is about 428.1866179662.

It can be divided in two parts, 7850 and 5353, that added together give a triangular number (13203 = T₁₆₂).

The spelling of 78505353 in words is "seventy-eight million, five hundred five thousand, three hundred fifty-three".