61161011 has 4 divisors (see below), whose sum is σ = 61307400. Its totient is φ = 61014624.

The previous prime is 61160989. The next prime is 61161013. The reversal of 61161011 is 11016116.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-61161011 is a prime.

It is a super-3 number, since 3×61161011³ (a number of 24 digits) contains 333 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (61161013) 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, 72566 + ... + 73403.

It is an arithmetic number, because the mean of its divisors is an integer number (15326850).

Almost surely, 2^61161011 is an apocalyptic number.

61161011 is a deficient number, since it is larger than the sum of its proper divisors (146389).

61161011 is a wasteful number, since it uses less digits than its factorization.

61161011 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 146388.

The product of its (nonzero) digits is 36, while the sum is 17.

The square root of 61161011 is about 7820.5505560670. The cubic root of 61161011 is about 393.9957633942.

Adding to 61161011 its reverse (11016116), we get a palindrome (72177127).

The spelling of 61161011 in words is "sixty-one million, one hundred sixty-one thousand, eleven".