55715878 has 8 divisors (see below), whose sum is σ = 83841768. Its totient is φ = 27768624.

The previous prime is 55715833. The next prime is 55715887. The reversal of 55715878 is 87851755.

It is a happy number.

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

It is a super-2 number, since 2×55715878² = 6208518122621768, 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 in 3 ways as a sum of consecutive naturals, for example, 43876 + ... + 45127.

It is an arithmetic number, because the mean of its divisors is an integer number (10480221).

Almost surely, 2^55715878 is an apocalyptic number.

55715878 is a deficient number, since it is larger than the sum of its proper divisors (28125890).

55715878 is a wasteful number, since it uses less digits than its factorization.

55715878 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 89318.

The product of its digits is 392000, while the sum is 46.

The square root of 55715878 is about 7464.3069336677. The cubic root of 55715878 is about 381.9381084455.

It can be divided in two parts, 5571 and 5878, that added together give a square (11449 = 107²).

The spelling of 55715878 in words is "fifty-five million, seven hundred fifteen thousand, eight hundred seventy-eight".