1347534750721 has 16 divisors (see below), whose sum is σ = 1384120362240. Its totient is φ = 1311281343360.

The previous prime is 1347534750707. The next prime is 1347534750739. The reversal of 1347534750721 is 1270574357431.

It is a cyclic number.

It is not a de Polignac number, because 1347534750721 - 2¹⁹ = 1347534226433 is a prime.

It is a super-2 number, since 2×1347534750721² (a number of 25 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1347534750791) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 81774535 + ... + 81791011.

It is an arithmetic number, because the mean of its divisors is an integer number (86507522640).

Almost surely, 2^{1347534750721} is an apocalyptic number.

It is an amenable number.

1347534750721 is a deficient number, since it is larger than the sum of its proper divisors (36585611519).

1347534750721 is a wasteful number, since it uses less digits than its factorization.

1347534750721 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 26424.

The product of its (nonzero) digits is 2469600, while the sum is 49.

The spelling of 1347534750721 in words is "one trillion, three hundred forty-seven billion, five hundred thirty-four million, seven hundred fifty thousand, seven hundred twenty-one".