61161807 has 32 divisors (see below), whose sum is σ = 98058240. Its totient is φ = 33153120.

The previous prime is 61161769. The next prime is 61161811. The reversal of 61161807 is 70816116.

It is a happy number.

61161807 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 61161807 - 2⁷ = 61161679 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (61161827) 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 31 ways as a sum of consecutive naturals, for example, 66682 + ... + 67592.

It is an arithmetic number, because the mean of its divisors is an integer number (3064320).

Almost surely, 2^61161807 is an apocalyptic number.

61161807 is a deficient number, since it is larger than the sum of its proper divisors (36896433).

61161807 is a wasteful number, since it uses less digits than its factorization.

61161807 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1083.

The product of its (nonzero) digits is 2016, while the sum is 30.

The square root of 61161807 is about 7820.6014474591. The cubic root of 61161807 is about 393.9974726491.

The spelling of 61161807 in words is "sixty-one million, one hundred sixty-one thousand, eight hundred seven".