61001061011 has 4 divisors (see below), whose sum is σ = 66546612024. Its totient is φ = 55455510000.

The previous prime is 61001060993. The next prime is 61001061013. The reversal of 61001061011 is 11016010016.

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

It is a de Polignac number, because none of the positive numbers 2^k-61001061011 is a prime.

It is a super-2 number, since 2×61001061011² (a number of 22 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (61001061013) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2772775490 + ... + 2772775511.

It is an arithmetic number, because the mean of its divisors is an integer number (16636653006).

Almost surely, 2^61001061011 is an apocalyptic number.

61001061011 is a deficient number, since it is larger than the sum of its proper divisors (5545551013).

61001061011 is a wasteful number, since it uses less digits than its factorization.

61001061011 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5545551012.

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

Adding to 61001061011 its reverse (11016010016), we get a palindrome (72017071027).

The spelling of 61001061011 in words is "sixty-one billion, one million, sixty-one thousand, eleven".