55807678 has 4 divisors (see below), whose sum is σ = 83711520. Its totient is φ = 27903838.

The previous prime is 55807639. The next prime is 55807699. The reversal of 55807678 is 87670855.

It is a semiprime because it is the product of two primes.

It is a super-2 number, since 2×55807678² = 6228993847503368, which contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 13951918 + ... + 13951921.

It is an arithmetic number, because the mean of its divisors is an integer number (20927880).

Almost surely, 2^55807678 is an apocalyptic number.

55807678 is a deficient number, since it is larger than the sum of its proper divisors (27903842).

55807678 is a wasteful number, since it uses less digits than its factorization.

55807678 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 27903841.

The product of its (nonzero) digits is 470400, while the sum is 46.

The square root of 55807678 is about 7470.4536676162. The cubic root of 55807678 is about 382.1477595102.

The spelling of 55807678 in words is "fifty-five million, eight hundred seven thousand, six hundred seventy-eight".