61061110511 has 4 divisors (see below), whose sum is σ = 61921126224. Its totient is φ = 60201094800.

The previous prime is 61061110507. The next prime is 61061110529. The reversal of 61061110511 is 11501116016.

It is a happy number.

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 61061110511 - 2² = 61061110507 is a prime.

It is a super-2 number, since 2×61061110511² (a number of 22 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (61061110531) 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, 430007750 + ... + 430007891.

It is an arithmetic number, because the mean of its divisors is an integer number (15480281556).

Almost surely, 2^61061110511 is an apocalyptic number.

61061110511 is a deficient number, since it is larger than the sum of its proper divisors (860015713).

61061110511 is an equidigital number, since it uses as much as digits as its factorization.

61061110511 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 860015712.

The product of its (nonzero) digits is 180, while the sum is 23.

Adding to 61061110511 its reverse (11501116016), we get a palindrome (72562226527).

The spelling of 61061110511 in words is "sixty-one billion, sixty-one million, one hundred ten thousand, five hundred eleven".