1061542242661 has 24 divisors (see below), whose sum is σ = 1167428949120. Its totient is φ = 964445179392.

The previous prime is 1061542242647. The next prime is 1061542242679. The reversal of 1061542242661 is 1662422451601.

It is not a de Polignac number, because 1061542242661 - 2¹³ = 1061542234469 is a prime.

It is a super-2 number, since 2×1061542242661² (a number of 25 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1061542242611) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 456270 + ... + 1526848.

It is an arithmetic number, because the mean of its divisors is an integer number (48642872880).

Almost surely, 2^{1061542242661} is an apocalyptic number.

It is an amenable number.

1061542242661 is a deficient number, since it is larger than the sum of its proper divisors (105886706459).

1061542242661 is a wasteful number, since it uses less digits than its factorization.

1061542242661 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1070733 (or 1070716 counting only the distinct ones).

The product of its (nonzero) digits is 138240, while the sum is 40.

The spelling of 1061542242661 in words is "one trillion, sixty-one billion, five hundred forty-two million, two hundred forty-two thousand, six hundred sixty-one".