126543208631 has 8 divisors (see below), whose sum is σ = 147984084864. Its totient is φ = 105943151160.

The previous prime is 126543208613. The next prime is 126543208681. The reversal of 126543208631 is 136802345621.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a de Polignac number, because none of the positive numbers 2^k-126543208631 is a prime.

It is a super-2 number, since 2×126543208631² (a number of 23 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (126543208681) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 210204365 + ... + 210204966.

It is an arithmetic number, because the mean of its divisors is an integer number (18498010608).

Almost surely, 2^126543208631 is an apocalyptic number.

126543208631 is a deficient number, since it is larger than the sum of its proper divisors (21440876233).

126543208631 is an equidigital number, since it uses as much as digits as its factorization.

126543208631 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 420409381.

The product of its (nonzero) digits is 207360, while the sum is 41.

The spelling of 126543208631 in words is "one hundred twenty-six billion, five hundred forty-three million, two hundred eight thousand, six hundred thirty-one".