55641315278 has 16 divisors (see below), whose sum is σ = 86173065216. Its totient is φ = 26917351320.

The previous prime is 55641315259. The next prime is 55641315281. The reversal of 55641315278 is 87251314655.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 196175 + ... + 386997.

It is an arithmetic number, because the mean of its divisors is an integer number (5385816576).

Almost surely, 2^55641315278 is an apocalyptic number.

55641315278 is a deficient number, since it is larger than the sum of its proper divisors (30531749938).

55641315278 is a wasteful number, since it uses less digits than its factorization.

55641315278 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 195559.

The product of its digits is 1008000, while the sum is 47.

The spelling of 55641315278 in words is "fifty-five billion, six hundred forty-one million, three hundred fifteen thousand, two hundred seventy-eight".