9778510020 has 48 divisors (see below), whose sum is σ = 27410035968. Its totient is φ = 2604725760.

The previous prime is 9778510019. The next prime is 9778510033. The reversal of 9778510020 is 200158779.

It is a super-2 number, since 2×9778510020² (a number of 21 digits) contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 34789 + ... + 144108.

It is an arithmetic number, because the mean of its divisors is an integer number (571042416).

Almost surely, 2^9778510020 is an apocalyptic number.

It is an amenable number.

9778510020 is an abundant number, since it is smaller than the sum of its proper divisors (17631525948).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

9778510020 is a wasteful number, since it uses less digits than its factorization.

9778510020 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 179820 (or 179818 counting only the distinct ones).

The product of its (nonzero) digits is 35280, while the sum is 39.

The square root of 9778510020 is about 98886.3490073327. The cubic root of 9778510020 is about 2138.4095980299.

Adding to 9778510020 its reverse (200158779), we get a palindrome (9978668799).

The spelling of 9778510020 in words is "nine billion, seven hundred seventy-eight million, five hundred ten thousand, twenty".