9956615426370 has 128 divisors (see below), whose sum is σ = 26748113414400. Its totient is φ = 2635388407296.

The previous prime is 9956615426363. The next prime is 9956615426393. The reversal of 9956615426370 is 736245166599.

9956615426370 is a `hidden beast` number, since 9 + 9 + 5 + 6 + 615 + 4 + 2 + 6 + 3 + 7 + 0 = 666.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 9956615426298 and 9956615426307.

It is an unprimeable number.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 489330537 + ... + 489350883.

It is an arithmetic number, because the mean of its divisors is an integer number (208969636050).

Almost surely, 2^{9956615426370} is an apocalyptic number.

9956615426370 is a gapful number since it is divisible by the number (90) formed by its first and last digit.

It is a practical number, because each smaller number is the sum of distinct divisors of 9956615426370, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (13374056707200).

9956615426370 is an abundant number, since it is smaller than the sum of its proper divisors (16791497988030).

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

9956615426370 is a wasteful number, since it uses less digits than its factorization.

9956615426370 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 33729 (or 33723 counting only the distinct ones).

The product of its (nonzero) digits is 73483200, while the sum is 63.

The spelling of 9956615426370 in words is "nine trillion, nine hundred fifty-six billion, six hundred fifteen million, four hundred twenty-six thousand, three hundred seventy".