126971631536 has 20 divisors (see below), whose sum is σ = 246015707112. Its totient is φ = 63483707136.

The previous prime is 126971631481. The next prime is 126971631559. The reversal of 126971631536 is 635136179621.

It is a super-2 number, since 2×126971631536² (a number of 23 digits) contains 22 as substring.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 440216 + ... + 669128.

Almost surely, 2^126971631536 is an apocalyptic number.

126971631536 is a gapful number since it is divisible by the number (16) formed by its first and last digit.

It is an amenable number.

126971631536 is a deficient number, since it is larger than the sum of its proper divisors (119044075576).

126971631536 is a wasteful number, since it uses less digits than its factorization.

126971631536 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 263588 (or 263582 counting only the distinct ones).

The product of its digits is 1224720, while the sum is 50.

The spelling of 126971631536 in words is "one hundred twenty-six billion, nine hundred seventy-one million, six hundred thirty-one thousand, five hundred thirty-six".