61411511 has 4 divisors (see below), whose sum is σ = 70184592. Its totient is φ = 52638432.

The previous prime is 61411501. The next prime is 61411517. The reversal of 61411511 is 11511416.

It is a happy number.

61411511 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes.

It is not a de Polignac number, because 61411511 - 2⁶ = 61411447 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (61411517) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 4386530 + ... + 4386543.

It is an arithmetic number, because the mean of its divisors is an integer number (17546148).

Almost surely, 2^61411511 is an apocalyptic number.

61411511 is a deficient number, since it is larger than the sum of its proper divisors (8773081).

61411511 is an equidigital number, since it uses as much as digits as its factorization.

61411511 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8773080.

The product of its digits is 120, while the sum is 20.

The square root of 61411511 is about 7836.5496872029. The cubic root of 61411511 is about 394.5329329535.

Adding to 61411511 its reverse (11511416), we get a palindrome (72922927).

The spelling of 61411511 in words is "sixty-one million, four hundred eleven thousand, five hundred eleven".