1061556551601 has 16 divisors (see below), whose sum is σ = 1742041521024. Its totient is φ = 559941917184.

The previous prime is 1061556551597. The next prime is 1061556551609.

1061556551601 is nontrivially palindromic in base 10.

It is not a de Polignac number, because 1061556551601 - 2² = 1061556551597 is a prime.

It is a super-2 number, since 2×1061556551601² (a number of 25 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (1061556551609) 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, 1944242496 + ... + 1944243041.

It is an arithmetic number, because the mean of its divisors is an integer number (108877595064).

Almost surely, 2^{1061556551601} is an apocalyptic number.

It is an amenable number.

1061556551601 is a deficient number, since it is larger than the sum of its proper divisors (680484969423).

1061556551601 is a wasteful number, since it uses less digits than its factorization.

1061556551601 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3888485560.

The product of its (nonzero) digits is 135000, while the sum is 42.

The spelling of 1061556551601 in words is "one trillion, sixty-one billion, five hundred fifty-six million, five hundred fifty-one thousand, six hundred one".