1061187671641 has 4 divisors (see below), whose sum is σ = 1061259616692. Its totient is φ = 1061115726592.

The previous prime is 1061187671561. The next prime is 1061187671651. The reversal of 1061187671641 is 1461767811601.

It is a happy number.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 404755529616 + 656432142025 = 636204^2 + 810205^2 .

It is a cyclic number.

It is not a de Polignac number, because 1061187671641 - 2¹⁵ = 1061187638873 is a prime.

It is a super-2 number, since 2×1061187671641² (a number of 25 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1061187671651) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 35950396 + ... + 35979901.

It is an arithmetic number, because the mean of its divisors is an integer number (265314904173).

Almost surely, 2^{1061187671641} is an apocalyptic number.

It is an amenable number.

1061187671641 is a deficient number, since it is larger than the sum of its proper divisors (71945051).

1061187671641 is an equidigital number, since it uses as much as digits as its factorization.

1061187671641 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 71945050.

The product of its (nonzero) digits is 338688, while the sum is 49.

The spelling of 1061187671641 in words is "one trillion, sixty-one billion, one hundred eighty-seven million, six hundred seventy-one thousand, six hundred forty-one".