3491381160721 has 8 divisors (see below), whose sum is σ = 3500148274784. Its totient is φ = 3482617291200.

The previous prime is 3491381160689. The next prime is 3491381160737. The reversal of 3491381160721 is 1270611831943.

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

It is a cyclic number.

It is not a de Polignac number, because 3491381160721 - 2⁵ = 3491381160689 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (3491381160791) 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 7 ways as a sum of consecutive naturals, for example, 1350946 + ... + 2967796.

It is an arithmetic number, because the mean of its divisors is an integer number (437518534348).

Almost surely, 2^{3491381160721} is an apocalyptic number.

It is an amenable number.

3491381160721 is a deficient number, since it is larger than the sum of its proper divisors (8767114063).

3491381160721 is a wasteful number, since it uses less digits than its factorization.

3491381160721 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1622271.

The product of its (nonzero) digits is 217728, while the sum is 46.

The spelling of 3491381160721 in words is "three trillion, four hundred ninety-one billion, three hundred eighty-one million, one hundred sixty thousand, seven hundred twenty-one".