1481951811 has 4 divisors (see below), whose sum is σ = 1975935752. Its totient is φ = 987967872.

The previous prime is 1481951791. The next prime is 1481951837. The reversal of 1481951811 is 1181591841.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 1181591841 = 3 ⋅393863947.

It is not a de Polignac number, because 1481951811 - 2⁹ = 1481951299 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 1481951811.

It is not an unprimeable number, because it can be changed into a prime (1481951411) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 246991966 + ... + 246991971.

It is an arithmetic number, because the mean of its divisors is an integer number (493983938).

Almost surely, 2^1481951811 is an apocalyptic number.

1481951811 is a deficient number, since it is larger than the sum of its proper divisors (493983941).

1481951811 is an equidigital number, since it uses as much as digits as its factorization.

1481951811 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 493983940.

The product of its digits is 11520, while the sum is 39.

The square root of 1481951811 is about 38496.1272207998. The cubic root of 1481951811 is about 1140.1045895115.

The spelling of 1481951811 in words is "one billion, four hundred eighty-one million, nine hundred fifty-one thousand, eight hundred eleven".