55013527978 has 4 divisors (see below), whose sum is σ = 82520291970. Its totient is φ = 27506763988.

The previous prime is 55013527969. The next prime is 55013528023. The reversal of 55013527978 is 87972531055.

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

It can be written as a sum of positive squares in only one way, i.e., 50869644849 + 4143883129 = 225543^2 + 64373^2 .

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 13753381993 + ... + 13753381996.

Almost surely, 2^55013527978 is an apocalyptic number.

55013527978 is a deficient number, since it is larger than the sum of its proper divisors (27506763992).

55013527978 is a wasteful number, since it uses less digits than its factorization.

55013527978 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 27506763991.

The product of its (nonzero) digits is 2646000, while the sum is 52.

The spelling of 55013527978 in words is "fifty-five billion, thirteen million, five hundred twenty-seven thousand, nine hundred seventy-eight".