61811841 has 32 divisors (see below), whose sum is σ = 101945088. Its totient is φ = 32440320.

The previous prime is 61811839. The next prime is 61811903. The reversal of 61811841 is 14811816.

61811841 = 393² + 394² + ... + 626².

61811841 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 61811841 - 2¹ = 61811839 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 61811799 and 61811808.

It is not an unprimeable number, because it can be changed into a prime (61811821) 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, 69721 + ... + 70601.

It is an arithmetic number, because the mean of its divisors is an integer number (3185784).

Almost surely, 2^61811841 is an apocalyptic number.

It is an amenable number.

61811841 is a deficient number, since it is larger than the sum of its proper divisors (40133247).

61811841 is a wasteful number, since it uses less digits than its factorization.

61811841 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1161.

The product of its digits is 1536, while the sum is 30.

The square root of 61811841 is about 7862.0506866847. The cubic root of 61811841 is about 395.3883719587.

The spelling of 61811841 in words is "sixty-one million, eight hundred eleven thousand, eight hundred forty-one".