127545003537721 has 16 divisors (see below), whose sum is σ = 159023862241920. Its totient is φ = 99381520183680.

The previous prime is 127545003537647. The next prime is 127545003537739. The reversal of 127545003537721 is 127735300545721.

It is not a de Polignac number, because 127545003537721 - 2¹¹ = 127545003535673 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (127545003531721) 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 15 ways as a sum of consecutive naturals, for example, 33137926 + ... + 36786031.

It is an arithmetic number, because the mean of its divisors is an integer number (9938991390120).

Almost surely, 2^{127545003537721} is an apocalyptic number.

127545003537721 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

127545003537721 is a deficient number, since it is larger than the sum of its proper divisors (31478858704199).

127545003537721 is a wasteful number, since it uses less digits than its factorization.

127545003537721 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 69947664.

The product of its (nonzero) digits is 6174000, while the sum is 52.

The spelling of 127545003537721 in words is "one hundred twenty-seven trillion, five hundred forty-five billion, three million, five hundred thirty-seven thousand, seven hundred twenty-one".