326181091978 has 64 divisors (see below), whose sum is σ = 577896145920. Its totient is φ = 135191347200.

The previous prime is 326181091931. The next prime is 326181091981. The reversal of 326181091978 is 879190181623.

It is a happy number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 37569798 + ... + 37578478.

It is an arithmetic number, because the mean of its divisors is an integer number (9029627280).

Almost surely, 2^326181091978 is an apocalyptic number.

326181091978 is a deficient number, since it is larger than the sum of its proper divisors (251715053942).

326181091978 is a wasteful number, since it uses less digits than its factorization.

326181091978 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9463.

The product of its (nonzero) digits is 1306368, while the sum is 55.

The spelling of 326181091978 in words is "three hundred twenty-six billion, one hundred eighty-one million, ninety-one thousand, nine hundred seventy-eight".