181278481996 has 12 divisors (see below), whose sum is σ = 322614248040. Its totient is φ = 89102982560.

The previous prime is 181278481961. The next prime is 181278481997. The reversal of 181278481996 is 699184872181.

It is a super-2 number, since 2×181278481996² (a number of 23 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (181278481997) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 384064345 + ... + 384064816.

It is an arithmetic number, because the mean of its divisors is an integer number (26884520670).

Almost surely, 2^181278481996 is an apocalyptic number.

It is an amenable number.

181278481996 is a deficient number, since it is larger than the sum of its proper divisors (141335766044).

181278481996 is a wasteful number, since it uses less digits than its factorization.

181278481996 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 768129224 (or 768129222 counting only the distinct ones).

The product of its digits is 13934592, while the sum is 64.

The spelling of 181278481996 in words is "one hundred eighty-one billion, two hundred seventy-eight million, four hundred eighty-one thousand, nine hundred ninety-six".