9906778275838 has 8 divisors (see below), whose sum is σ = 14883350204160. Its totient is φ = 4945661541120.

The previous prime is 9906778275827. The next prime is 9906778275887. The reversal of 9906778275838 is 8385728776099.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3863796798 + ... + 3863799361.

It is an arithmetic number, because the mean of its divisors is an integer number (1860418775520).

Almost surely, 2^{9906778275838} is an apocalyptic number.

9906778275838 is a deficient number, since it is larger than the sum of its proper divisors (4976571928322).

9906778275838 is a wasteful number, since it uses less digits than its factorization.

9906778275838 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7727596802.

The product of its (nonzero) digits is 2560481280, while the sum is 79.

The spelling of 9906778275838 in words is "nine trillion, nine hundred six billion, seven hundred seventy-eight million, two hundred seventy-five thousand, eight hundred thirty-eight".