127999607484591 has 40 divisors (see below), whose sum is σ = 199531792389600. Its totient is φ = 81619233873408.

The previous prime is 127999607484533. The next prime is 127999607484667. The reversal of 127999607484591 is 195484706999721.

127999607484591 is a `hidden beast` number, since 1 + 2 + 7 + 9 + 9 + 96 + 0 + 74 + 8 + 459 + 1 = 666.

It is not a de Polignac number, because 127999607484591 - 2⁶ = 127999607484527 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (81).

It is a self number, because there is not a number n which added to its sum of digits gives 127999607484591.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (127999607584591) by changing a digit.

It is a polite number, since it can be written in 39 ways as a sum of consecutive naturals, for example, 39797635 + ... + 42893483.

It is an arithmetic number, because the mean of its divisors is an integer number (4988294809740).

Almost surely, 2^{127999607484591} is an apocalyptic number.

127999607484591 is a deficient number, since it is larger than the sum of its proper divisors (71532184905009).

127999607484591 is a wasteful number, since it uses less digits than its factorization.

127999607484591 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3118077 (or 3118068 counting only the distinct ones).

The product of its (nonzero) digits is 2469035520, while the sum is 81.

The spelling of 127999607484591 in words is "one hundred twenty-seven trillion, nine hundred ninety-nine billion, six hundred seven million, four hundred eighty-four thousand, five hundred ninety-one".