78561153 has 12 divisors (see below), whose sum is σ = 123793488. Its totient is φ = 47612760.

The previous prime is 78561151. The next prime is 78561179. The reversal of 78561153 is 35116587.

It is not a de Polignac number, because 78561153 - 2¹ = 78561151 is a prime.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (78561151) 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, 396675 + ... + 396872.

It is an arithmetic number, because the mean of its divisors is an integer number (10316124).

Almost surely, 2^78561153 is an apocalyptic number.

It is an amenable number.

78561153 is a deficient number, since it is larger than the sum of its proper divisors (45232335).

78561153 is a wasteful number, since it uses less digits than its factorization.

78561153 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 793564 (or 793561 counting only the distinct ones).

The product of its digits is 25200, while the sum is 36.

The square root of 78561153 is about 8863.4729649275. The cubic root of 78561153 is about 428.2880427046.

It can be divided in two parts, 7856 and 1153, that added together give a palindrome (9009).

The spelling of 78561153 in words is "seventy-eight million, five hundred sixty-one thousand, one hundred fifty-three".