1061643263 has 8 divisors (see below), whose sum is σ = 1070538480. Its totient is φ = 1052775360.

The previous prime is 1061643241. The next prime is 1061643283. The reversal of 1061643263 is 3623461601.

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

It is a cyclic number.

It is not a de Polignac number, because 1061643263 - 2⁶ = 1061643199 is a prime.

It is a super-2 number, since 2×1061643263² = 2254172835746574338, which 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 (1061643283) 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, 75308 + ... + 88286.

It is an arithmetic number, because the mean of its divisors is an integer number (133817310).

Almost surely, 2^1061643263 is an apocalyptic number.

1061643263 is a deficient number, since it is larger than the sum of its proper divisors (8895217).

1061643263 is a wasteful number, since it uses less digits than its factorization.

1061643263 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13657.

The product of its (nonzero) digits is 15552, while the sum is 32.

The square root of 1061643263 is about 32582.8676300905. The cubic root of 1061643263 is about 1020.1394346741.

The spelling of 1061643263 in words is "one billion, sixty-one million, six hundred forty-three thousand, two hundred sixty-three".