518054122978 has 12 divisors (see below), whose sum is σ = 903951582102. Its totient is φ = 222023195520.

The previous prime is 518054122867. The next prime is 518054122979. The reversal of 518054122978 is 879221450815.

It can be written as a sum of positive squares in only one way, i.e., 513310632849 + 4743490129 = 716457^2 + 68873^2 .

It is not an unprimeable number, because it can be changed into a prime (518054122979) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 2643133183 + ... + 2643133378.

Almost surely, 2^518054122978 is an apocalyptic number.

518054122978 is a deficient number, since it is larger than the sum of its proper divisors (385897459124).

518054122978 is a wasteful number, since it uses less digits than its factorization.

518054122978 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5286266577 (or 5286266570 counting only the distinct ones).

The product of its (nonzero) digits is 1612800, while the sum is 52.

The spelling of 518054122978 in words is "five hundred eighteen billion, fifty-four million, one hundred twenty-two thousand, nine hundred seventy-eight".