3505747857481 has 4 divisors (see below), whose sum is σ = 3506148385812. Its totient is φ = 3505347329152.

The previous prime is 3505747857457. The next prime is 3505747857497. The reversal of 3505747857481 is 1847587475053.

It is a happy number.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 2892057366025 + 613690491456 = 1700605^2 + 783384^2 .

It is a cyclic number.

It is not a de Polignac number, because 3505747857481 - 2⁹ = 3505747856969 is a prime.

It is a super-2 number, since 2×3505747857481² (a number of 26 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (3505747857181) by changing a digit.

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 3 ways as a sum of consecutive naturals, for example, 200251036 + ... + 200268541.

It is an arithmetic number, because the mean of its divisors is an integer number (876537096453).

Almost surely, 2^{3505747857481} is an apocalyptic number.

It is an amenable number.

3505747857481 is a deficient number, since it is larger than the sum of its proper divisors (400528331).

3505747857481 is an equidigital number, since it uses as much as digits as its factorization.

3505747857481 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 400528330.

The product of its (nonzero) digits is 131712000, while the sum is 64.

The spelling of 3505747857481 in words is "three trillion, five hundred five billion, seven hundred forty-seven million, eight hundred fifty-seven thousand, four hundred eighty-one".