1061643562251 has 16 divisors (see below), whose sum is σ = 1420091688960. Its totient is φ = 705482264960.

The previous prime is 1061643562241. The next prime is 1061643562279. The reversal of 1061643562251 is 1522653461601.

It is a cyclic number.

It is not a de Polignac number, because 1061643562251 - 2¹⁴ = 1061643545867 is a prime.

It is a super-2 number, since 2×1061643562251² (a number of 25 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (1061643562201) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 846706 + ... + 1685288.

It is an arithmetic number, because the mean of its divisors is an integer number (88755730560).

Almost surely, 2^{1061643562251} is an apocalyptic number.

1061643562251 is a deficient number, since it is larger than the sum of its proper divisors (358448126709).

1061643562251 is an equidigital number, since it uses as much as digits as its factorization.

1061643562251 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 839946.

The product of its (nonzero) digits is 259200, while the sum is 42.

The spelling of 1061643562251 in words is "one trillion, sixty-one billion, six hundred forty-three million, five hundred sixty-two thousand, two hundred fifty-one".