78553345 has 16 divisors (see below), whose sum is σ = 107488080. Its totient is φ = 54595584.

The previous prime is 78553337. The next prime is 78553351. The reversal of 78553345 is 54335587.

It can be written as a sum of positive squares in 8 ways, for example, as 17572864 + 60980481 = 4192^2 + 7809^2 .

It is a cyclic number.

It is not a de Polignac number, because 78553345 - 2³ = 78553337 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 78553298 and 78553307.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 34440 + ... + 36649.

It is an arithmetic number, because the mean of its divisors is an integer number (6718005).

Almost surely, 2^78553345 is an apocalyptic number.

It is an amenable number.

78553345 is a deficient number, since it is larger than the sum of its proper divisors (28934735).

78553345 is a wasteful number, since it uses less digits than its factorization.

78553345 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 71124.

The product of its digits is 252000, while the sum is 40.

The square root of 78553345 is about 8863.0324945811. The cubic root of 78553345 is about 428.2738534024.

The spelling of 78553345 in words is "seventy-eight million, five hundred fifty-three thousand, three hundred forty-five".