126247635561 has 8 divisors (see below), whose sum is σ = 168504259264. Its totient is φ = 84078051120.

The previous prime is 126247635541. The next prime is 126247635589. The reversal of 126247635561 is 165536742621.

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

It is not a de Polignac number, because 126247635561 - 2⁵ = 126247635529 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 126247635561.

It is not an unprimeable number, because it can be changed into a prime (126247635541) 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, 21756430 + ... + 21762231.

It is an arithmetic number, because the mean of its divisors is an integer number (21063032408).

Almost surely, 2^126247635561 is an apocalyptic number.

It is an amenable number.

126247635561 is a deficient number, since it is larger than the sum of its proper divisors (42256623703).

126247635561 is an equidigital number, since it uses as much as digits as its factorization.

126247635561 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 43519631.

The product of its digits is 1814400, while the sum is 48.

The spelling of 126247635561 in words is "one hundred twenty-six billion, two hundred forty-seven million, six hundred thirty-five thousand, five hundred sixty-one".