61859961 has 12 divisors (see below), whose sum is σ = 90687792. Its totient is φ = 40624056.

The previous prime is 61859933. The next prime is 61859971. The reversal of 61859961 is 16995816.

It is not a de Polignac number, because 61859961 - 2¹⁴ = 61843577 is a prime.

It is not an unprimeable number, because it can be changed into a prime (61859921) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 50691 + ... + 51896.

It is an arithmetic number, because the mean of its divisors is an integer number (7557316).

Almost surely, 2^61859961 is an apocalyptic number.

It is an amenable number.

61859961 is a deficient number, since it is larger than the sum of its proper divisors (28827831).

61859961 is a wasteful number, since it uses less digits than its factorization.

61859961 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 102660 (or 102657 counting only the distinct ones).

The product of its digits is 116640, while the sum is 45.

The square root of 61859961 is about 7865.1103615906. The cubic root of 61859961 is about 395.4909475228.

The spelling of 61859961 in words is "sixty-one million, eight hundred fifty-nine thousand, nine hundred sixty-one".