127521727775145 has 64 divisors (see below), whose sum is σ = 252576884551680. Its totient is φ = 60513211857600.

The previous prime is 127521727775053. The next prime is 127521727775147. The reversal of 127521727775145 is 541577727125721.

127521727775145 is a `hidden beast` number, since 1 + 2 + 7 + 5 + 21 + 7 + 27 + 77 + 514 + 5 = 666.

It is not a de Polignac number, because 127521727775145 - 2⁷ = 127521727775017 is a prime.

It is not an unprimeable number, because it can be changed into a prime (127521727775147) by changing a digit.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 913475071 + ... + 913614660.

It is an arithmetic number, because the mean of its divisors is an integer number (3946513821120).

Almost surely, 2^{127521727775145} is an apocalyptic number.

127521727775145 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

127521727775145 is a deficient number, since it is larger than the sum of its proper divisors (125055156776535).

127521727775145 is a wasteful number, since it uses less digits than its factorization.

127521727775145 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1827089803 (or 1827089797 counting only the distinct ones).

The product of its digits is 67228000, while the sum is 63.

The spelling of 127521727775145 in words is "one hundred twenty-seven trillion, five hundred twenty-one billion, seven hundred twenty-seven million, seven hundred seventy-five thousand, one hundred forty-five".