978255508624 has 45 divisors (see below), whose sum is σ = 1936923258361. Its totient is φ = 478629786560.

The previous prime is 978255508621. The next prime is 978255508631. The reversal of 978255508624 is 426805552879.

The square root of 978255508624 is 989068.

It is a perfect power (a square), and thus also a powerful number.

It can be written as a sum of positive squares in only one way, i.e., 728175502224 + 250080006400 = 853332^2 + 500080^2 .

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (978255508621) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 8 ways as a sum of consecutive naturals, for example, 185942154 + ... + 185947414.

Almost surely, 2^978255508624 is an apocalyptic number.

978255508624 is a gapful number since it is divisible by the number (94) formed by its first and last digit.

978255508624 is the 989068-th square number.

It is an amenable number.

978255508624 is a deficient number, since it is larger than the sum of its proper divisors (958667749737).

978255508624 is an frugal number, since it uses more digits than its factorization.

978255508624 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10624 (or 5310 counting only the distinct ones).

The product of its (nonzero) digits is 48384000, while the sum is 61.

The spelling of 978255508624 in words is "nine hundred seventy-eight billion, two hundred fifty-five million, five hundred eight thousand, six hundred twenty-four".