126575575621 has 16 divisors (see below), whose sum is σ = 139764927168. Its totient is φ = 113671792000.

The previous prime is 126575575579. The next prime is 126575575661.

It is a happy number.

126575575621 is nontrivially palindromic in base 10.

It is a cyclic number.

It is not a de Polignac number, because 126575575621 - 2¹⁵ = 126575542853 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (126575575661) 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, 363585 + ... + 620761.

It is an arithmetic number, because the mean of its divisors is an integer number (8735307948).

Almost surely, 2^126575575621 is an apocalyptic number.

126575575621 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

126575575621 is a deficient number, since it is larger than the sum of its proper divisors (13189351547).

126575575621 is a wasteful number, since it uses less digits than its factorization.

126575575621 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 257732.

The product of its digits is 4410000, while the sum is 52.

The spelling of 126575575621 in words is "one hundred twenty-six billion, five hundred seventy-five million, five hundred seventy-five thousand, six hundred twenty-one".