78553606 has 4 divisors (see below), whose sum is σ = 117830412. Its totient is φ = 39276802.

The previous prime is 78553589. The next prime is 78553609. The reversal of 78553606 is 60635587.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 60635587 = 5101 ⋅11887.

It is a Smith number, since the sum of its digits (40) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (78553609) 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 as a sum of consecutive naturals, namely, 19638400 + ... + 19638403.

It is an arithmetic number, because the mean of its divisors is an integer number (29457603).

Almost surely, 2^78553606 is an apocalyptic number.

78553606 is a deficient number, since it is larger than the sum of its proper divisors (39276806).

78553606 is a wasteful number, since it uses less digits than its factorization.

78553606 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 39276805.

The product of its (nonzero) digits is 151200, while the sum is 40.

The square root of 78553606 is about 8863.0472186489. The cubic root of 78553606 is about 428.2743277270.

The spelling of 78553606 in words is "seventy-eight million, five hundred fifty-three thousand, six hundred six".