127632644557 has 16 divisors (see below), whose sum is σ = 147456288000. Its totient is φ = 109181923840.

The previous prime is 127632644549. The next prime is 127632644561. The reversal of 127632644557 is 755446236721.

It is not a de Polignac number, because 127632644557 - 2³ = 127632644549 is a prime.

It is a super-3 number, since 3×127632644557³ (a number of 34 digits) contains 333 as substring. Note that it is a super-d number also for d = 2.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (127632644057) 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, 874569 + ... + 1010017.

It is an arithmetic number, because the mean of its divisors is an integer number (9216018000).

Almost surely, 2^127632644557 is an apocalyptic number.

127632644557 is a gapful number since it is divisible by the number (17) formed by its first and last digit.

It is an amenable number.

127632644557 is a deficient number, since it is larger than the sum of its proper divisors (19823643443).

127632644557 is a wasteful number, since it uses less digits than its factorization.

127632644557 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 140516.

The product of its digits is 8467200, while the sum is 52.

The spelling of 127632644557 in words is "one hundred twenty-seven billion, six hundred thirty-two million, six hundred forty-four thousand, five hundred fifty-seven".