127989355536 has 135 divisors (see below), whose sum is σ = 416770686111. Its totient is φ = 36559801152.

The previous prime is 127989355493. The next prime is 127989355561. The reversal of 127989355536 is 635553989721.

It is a happy number.

The square root of 127989355536 is 357756.

It is a perfect power (a square), and thus also a powerful number.

127989355536 is a `hidden beast` number, since 1 + 2 + 7 + 9 + 8 + 93 + 5 + 5 + 536 = 666.

It is a super-2 number, since 2×127989355536² (a number of 23 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (63).

It is an unprimeable number.

It is a polite number, since it can be written in 26 ways as a sum of consecutive naturals, for example, 30049375 + ... + 30053633.

Almost surely, 2^127989355536 is an apocalyptic number.

127989355536 is a gapful number since it is divisible by the number (16) formed by its first and last digit.

127989355536 is the 357756-th square number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 127989355536

127989355536 is an abundant number, since it is smaller than the sum of its proper divisors (288781330575).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

127989355536 is an frugal number, since it uses more digits than its factorization.

127989355536 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8546 (or 4271 counting only the distinct ones).

The product of its digits is 61236000, while the sum is 63.

The spelling of 127989355536 in words is "one hundred twenty-seven billion, nine hundred eighty-nine million, three hundred fifty-five thousand, five hundred thirty-six".