61000061 has 8 divisors (see below), whose sum is σ = 62620248. Its totient is φ = 59400000.

The previous prime is 61000039. The next prime is 61000091. The reversal of 61000061 is 16000016.

It can be written as a sum of positive squares in 4 ways, for example, as 23863225 + 37136836 = 4885^2 + 6094^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 61000061 - 2¹⁴ = 60983677 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 (61000001) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1211 + ... + 11111.

It is an arithmetic number, because the mean of its divisors is an integer number (7827531).

Almost surely, 2^61000061 is an apocalyptic number.

61000061 is a gapful number since it is divisible by the number (61) formed by its first and last digit.

It is an amenable number.

61000061 is a deficient number, since it is larger than the sum of its proper divisors (1620187).

61000061 is a wasteful number, since it uses less digits than its factorization.

61000061 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10063.

The product of its (nonzero) digits is 36, while the sum is 14.

The square root of 61000061 is about 7810.2535810305. The cubic root of 61000061 is about 393.6498495267.

Adding to 61000061 its reverse (16000016), we get a palindrome (77000077).

It can be divided in two parts, 610000 and 61, that multiplied together give a square (37210000 = 6100²).

The spelling of 61000061 in words is "sixty-one million, sixty-one", and thus it is an aban number and an uban number.