61006511 has 16 divisors (see below), whose sum is σ = 67564800. Its totient is φ = 54825408.

The previous prime is 61006487. The next prime is 61006529. The reversal of 61006511 is 11560016.

It is a happy number.

It is a cyclic number.

It is not a de Polignac number, because 61006511 - 2⁶ = 61006447 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (61006571) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 59360 + ... + 60378.

It is an arithmetic number, because the mean of its divisors is an integer number (4222800).

Almost surely, 2^61006511 is an apocalyptic number.

61006511 is a deficient number, since it is larger than the sum of its proper divisors (6558289).

61006511 is a wasteful number, since it uses less digits than its factorization.

61006511 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1198.

The product of its (nonzero) digits is 180, while the sum is 20.

The square root of 61006511 is about 7810.6664888472. Note that the first 3 decimals coincide. The cubic root of 61006511 is about 393.6637235678.

Adding to 61006511 its reverse (11560016), we get a palindrome (72566527).

The spelling of 61006511 in words is "sixty-one million, six thousand, five hundred eleven".