978506017418 has 4 divisors (see below), whose sum is σ = 1467759026130. Its totient is φ = 489253008708.

The previous prime is 978506017417. The next prime is 978506017421. The reversal of 978506017418 is 814710605879.

It is a happy number.

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., 660226126849 + 318279890569 = 812543^2 + 564163^2 .

It is a super-2 number, since 2×978506017418² (a number of 25 digits) contains 22 as substring.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (978506017417) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 244626504353 + ... + 244626504356.

Almost surely, 2^978506017418 is an apocalyptic number.

978506017418 is a deficient number, since it is larger than the sum of its proper divisors (489253008712).

978506017418 is a wasteful number, since it uses less digits than its factorization.

978506017418 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 489253008711.

The product of its (nonzero) digits is 3386880, while the sum is 56.

The spelling of 978506017418 in words is "nine hundred seventy-eight billion, five hundred six million, seventeen thousand, four hundred eighteen".