61600081 has 8 divisors (see below), whose sum is σ = 63318528. Its totient is φ = 59892000.

The previous prime is 61600067. The next prime is 61600087. The reversal of 61600081 is 18000616.

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 61600081 - 2¹³ = 61591889 is a prime.

It is a super-2 number, since 2×61600081² = 7589139958413122, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (61600087) 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, 10336 + ... + 15166.

It is an arithmetic number, because the mean of its divisors is an integer number (7914816).

Almost surely, 2^61600081 is an apocalyptic number.

It is an amenable number.

61600081 is a deficient number, since it is larger than the sum of its proper divisors (1718447).

61600081 is a wasteful number, since it uses less digits than its factorization.

61600081 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5183.

The product of its (nonzero) digits is 288, while the sum is 22.

The square root of 61600081 is about 7848.5719083156. The cubic root of 61600081 is about 394.9363375475.

Adding to 61600081 its reverse (18000616), we get a palindrome (79600697).

The spelling of 61600081 in words is "sixty-one million, six hundred thousand, eighty-one".