78555542 has 8 divisors (see below), whose sum is σ = 126897456. Its totient is φ = 36256392.

The previous prime is 78555509. The next prime is 78555569. The reversal of 78555542 is 24555587.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a self number, because there is not a number n which added to its sum of digits gives 78555542.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1510658 + ... + 1510709.

It is an arithmetic number, because the mean of its divisors is an integer number (15862182).

Almost surely, 2^78555542 is an apocalyptic number.

78555542 is a deficient number, since it is larger than the sum of its proper divisors (48341914).

78555542 is a wasteful number, since it uses less digits than its factorization.

78555542 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3021382.

The product of its digits is 280000, while the sum is 41.

The square root of 78555542 is about 8863.1564354918. The cubic root of 78555542 is about 428.2778460560.

It can be divided in two parts, 78555 and 542, that added together give a palindrome (79097).

The spelling of 78555542 in words is "seventy-eight million, five hundred fifty-five thousand, five hundred forty-two".