1481068781 has 8 divisors (see below), whose sum is σ = 1569367224. Its totient is φ = 1392901120.

The previous prime is 1481068751. The next prime is 1481068811. The reversal of 1481068781 is 1878601841.

It is an interprime number because it is at equal distance from previous prime (1481068751) and next prime (1481068811).

It can be written as a sum of positive squares in 4 ways, for example, as 680688100 + 800380681 = 26090^2 + 28291^2 .

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

It is a de Polignac number, because none of the positive numbers 2^k-1481068781 is a prime.

It is a super-2 number, since 2×1481068781² = 4387129468105651922, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1481068711) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 8870 + ... + 55143.

It is an arithmetic number, because the mean of its divisors is an integer number (196170903).

Almost surely, 2^1481068781 is an apocalyptic number.

It is an amenable number.

1481068781 is a deficient number, since it is larger than the sum of its proper divisors (88298443).

1481068781 is a wasteful number, since it uses less digits than its factorization.

1481068781 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 65391.

The product of its (nonzero) digits is 86016, while the sum is 44.

The square root of 1481068781 is about 38484.6564360395. The cubic root of 1481068781 is about 1139.8780984356.

The spelling of 1481068781 in words is "one billion, four hundred eighty-one million, sixty-eight thousand, seven hundred eighty-one".