10111561601 has 2 divisors, whose sum is σ = 10111561602. Its totient is φ = 10111561600.

The previous prime is 10111561589. The next prime is 10111561637. The reversal of 10111561601 is 10616511101.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 9904230400 + 207331201 = 99520^2 + 14399^2 .

It is a cyclic number.

It is not a de Polignac number, because 10111561601 - 2²² = 10107367297 is a prime.

It is not a weakly prime, because it can be changed into another prime (10111561661) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5055780800 + 5055780801.

It is an arithmetic number, because the mean of its divisors is an integer number (5055780801).

Almost surely, 2^10111561601 is an apocalyptic number.

It is an amenable number.

10111561601 is a deficient number, since it is larger than the sum of its proper divisors (1).

10111561601 is an equidigital number, since it uses as much as digits as its factorization.

10111561601 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 180, while the sum is 23.

The spelling of 10111561601 in words is "ten billion, one hundred eleven million, five hundred sixty-one thousand, six hundred one".