61036581 has 8 divisors (see below), whose sum is σ = 82023424. Its totient is φ = 40370400.

The previous prime is 61036567. The next prime is 61036583. The reversal of 61036581 is 18563016.

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

It is not a de Polignac number, because 61036581 - 2¹³ = 61028389 is a prime.

It is a super-2 number, since 2×61036581² = 7450928440339122, which contains 22 as substring.

It is an alternating number because its digits alternate between even and odd.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (61036583) 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, 79720 + ... + 80481.

It is an arithmetic number, because the mean of its divisors is an integer number (10252928).

Almost surely, 2^61036581 is an apocalyptic number.

It is an amenable number.

61036581 is a deficient number, since it is larger than the sum of its proper divisors (20986843).

61036581 is a wasteful number, since it uses less digits than its factorization.

61036581 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 160331.

The product of its (nonzero) digits is 4320, while the sum is 30.

The square root of 61036581 is about 7812.5911834679. The cubic root of 61036581 is about 393.7283916587.

Adding to 61036581 its reverse (18563016), we get a palindrome (79599597).

The spelling of 61036581 in words is "sixty-one million, thirty-six thousand, five hundred eighty-one".