4128867711561 has 32 divisors (see below), whose sum is σ = 5573951705088. Its totient is φ = 2718336067200.

The previous prime is 4128867711559. The next prime is 4128867711643. The reversal of 4128867711561 is 1651177688214.

4128867711561 is digitally balanced in base 2 and base 3, because in such bases it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 4128867711561 - 2¹ = 4128867711559 is a prime.

It is not an unprimeable number, because it can be changed into a prime (4128867781561) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 259881760 + ... + 259897646.

It is an arithmetic number, because the mean of its divisors is an integer number (174185990784).

Almost surely, 2^{4128867711561} is an apocalyptic number.

It is an amenable number.

4128867711561 is a deficient number, since it is larger than the sum of its proper divisors (1445083993527).

4128867711561 is a wasteful number, since it uses less digits than its factorization.

4128867711561 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 18261.

The product of its digits is 4515840, while the sum is 57.

The spelling of 4128867711561 in words is "four trillion, one hundred twenty-eight billion, eight hundred sixty-seven million, seven hundred eleven thousand, five hundred sixty-one".