9628781058402 has 96 divisors (see below), whose sum is σ = 21497140566720. Its totient is φ = 2872641446400.

The previous prime is 9628781058329. The next prime is 9628781058443. The reversal of 9628781058402 is 2048501878269.

It is a super-2 number, since 2×9628781058402² (a number of 27 digits) contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 14735277 + ... + 15374847.

It is an arithmetic number, because the mean of its divisors is an integer number (223928547570).

Almost surely, 2^{9628781058402} is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 9628781058402, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (10748570283360).

9628781058402 is an abundant number, since it is smaller than the sum of its proper divisors (11868359508318).

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

9628781058402 is a wasteful number, since it uses less digits than its factorization.

9628781058402 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 639920 (or 639909 counting only the distinct ones).

The product of its (nonzero) digits is 15482880, while the sum is 60.

The spelling of 9628781058402 in words is "nine trillion, six hundred twenty-eight billion, seven hundred eighty-one million, fifty-eight thousand, four hundred two".