9946778426 has 32 divisors (see below), whose sum is σ = 16979578560. Its totient is φ = 4332220416.

The previous prime is 9946778399. The next prime is 9946778459. The reversal of 9946778426 is 6248776499.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 87785 + ... + 166131.

It is an arithmetic number, because the mean of its divisors is an integer number (530611830).

Almost surely, 2^9946778426 is an apocalyptic number.

9946778426 is a deficient number, since it is larger than the sum of its proper divisors (7032800134).

9946778426 is a wasteful number, since it uses less digits than its factorization.

9946778426 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 78638.

The product of its digits is 36578304, while the sum is 62.

The square root of 9946778426 is about 99733.5371176617. The cubic root of 9946778426 is about 2150.6058091651.

The spelling of 9946778426 in words is "nine billion, nine hundred forty-six million, seven hundred seventy-eight thousand, four hundred twenty-six".