5581126261601 has 16 divisors (see below), whose sum is σ = 6188449413888. Its totient is φ = 4990464787200.

The previous prime is 5581126261591. The next prime is 5581126261609. The reversal of 5581126261601 is 1061626211855.

It is a cyclic number.

It is not a de Polignac number, because 5581126261601 - 2⁴² = 1183079750497 is a prime.

It is a super-2 number, since 2×5581126261601² (a number of 26 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (5581126261609) 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, 54734201 + ... + 54836073.

It is an arithmetic number, because the mean of its divisors is an integer number (386778088368).

Almost surely, 2^{5581126261601} is an apocalyptic number.

It is an amenable number.

5581126261601 is a deficient number, since it is larger than the sum of its proper divisors (607323152287).

5581126261601 is a wasteful number, since it uses less digits than its factorization.

5581126261601 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 183592.

The product of its (nonzero) digits is 172800, while the sum is 44.

The spelling of 5581126261601 in words is "five trillion, five hundred eighty-one billion, one hundred twenty-six million, two hundred sixty-one thousand, six hundred one".