1061156643 has 8 divisors (see below), whose sum is σ = 1498103568. Its totient is φ = 665823744.

The previous prime is 1061156641. The next prime is 1061156651. The reversal of 1061156643 is 3466511601.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 1061156643 - 2¹ = 1061156641 is a prime.

It is a super-2 number, since 2×1061156643² = 2252106841966058898, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (1061156641) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 10403446 + ... + 10403547.

It is an arithmetic number, because the mean of its divisors is an integer number (187262946).

Almost surely, 2^1061156643 is an apocalyptic number.

1061156643 is a deficient number, since it is larger than the sum of its proper divisors (436946925).

1061156643 is a wasteful number, since it uses less digits than its factorization.

1061156643 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 20807013.

The product of its (nonzero) digits is 12960, while the sum is 33.

The square root of 1061156643 is about 32575.3993528859. The cubic root of 1061156643 is about 1019.9835454862.

The spelling of 1061156643 in words is "one billion, sixty-one million, one hundred fifty-six thousand, six hundred forty-three".