61601011 has 4 divisors (see below), whose sum is σ = 62211024. Its totient is φ = 60991000.

The previous prime is 61601009. The next prime is 61601027. The reversal of 61601011 is 11010616.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 61601011 - 2¹ = 61601009 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (61601711) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 304855 + ... + 305056.

It is an arithmetic number, because the mean of its divisors is an integer number (15552756).

Almost surely, 2^61601011 is an apocalyptic number.

61601011 is a deficient number, since it is larger than the sum of its proper divisors (610013).

61601011 is a wasteful number, since it uses less digits than its factorization.

61601011 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 610012.

The product of its (nonzero) digits is 36, while the sum is 16.

The square root of 61601011 is about 7848.6311545390. The cubic root of 61601011 is about 394.9383250392.

Adding to 61601011 its reverse (11010616), we get a palindrome (72611627).

The spelling of 61601011 in words is "sixty-one million, six hundred one thousand, eleven".