126616556101 has 6 divisors (see below), whose sum is σ = 147288646950. Its totient is φ = 108528476616.

The previous prime is 126616556069. The next prime is 126616556107. The reversal of 126616556101 is 101655616621.

It can be written as a sum of positive squares in only one way, i.e., 109131783201 + 17484772900 = 330351^2 + 132230^2 .

It is not a de Polignac number, because 126616556101 - 2⁵ = 126616556069 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 (126616556107) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 1292005626 + ... + 1292005723.

It is an arithmetic number, because the mean of its divisors is an integer number (24548107825).

Almost surely, 2^126616556101 is an apocalyptic number.

It is an amenable number.

126616556101 is a deficient number, since it is larger than the sum of its proper divisors (20672090849).

126616556101 is an equidigital number, since it uses as much as digits as its factorization.

126616556101 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2584011363 (or 2584011356 counting only the distinct ones).

The product of its (nonzero) digits is 64800, while the sum is 40.

The spelling of 126616556101 in words is "one hundred twenty-six billion, six hundred sixteen million, five hundred fifty-six thousand, one hundred one".