1071726561 has 24 divisors (see below), whose sum is σ = 1635828480. Its totient is φ = 674758656.

The previous prime is 1071726553. The next prime is 1071726599. The reversal of 1071726561 is 1656271701.

1071726561 is a `hidden beast` number, since 1 + 0 + 71 + 7 + 26 + 561 = 666.

It is not a de Polignac number, because 1071726561 - 2³ = 1071726553 is a prime.

It is a super-2 number, since 2×1071726561² = 2297195643105773442, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (1071726361) 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, 16416 + ... + 49121.

It is an arithmetic number, because the mean of its divisors is an integer number (68159520).

Almost surely, 2^1071726561 is an apocalyptic number.

It is an amenable number.

1071726561 is a deficient number, since it is larger than the sum of its proper divisors (564101919).

1071726561 is a wasteful number, since it uses less digits than its factorization.

1071726561 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 65645 (or 65642 counting only the distinct ones).

The product of its (nonzero) digits is 17640, while the sum is 36.

The square root of 1071726561 is about 32737.2350848388. The cubic root of 1071726561 is about 1023.3589639330.

The spelling of 1071726561 in words is "one billion, seventy-one million, seven hundred twenty-six thousand, five hundred sixty-one".