61000005011 has 8 divisors (see below), whose sum is σ = 67457042544. Its totient is φ = 54694897920.

The previous prime is 61000004999. The next prime is 61000005049. The reversal of 61000005011 is 11050000016.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-61000005011 is a prime.

It is a super-2 number, since 2×61000005011² (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 (61000005061) 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 7 ways as a sum of consecutive naturals, for example, 37981766 + ... + 37983371.

It is an arithmetic number, because the mean of its divisors is an integer number (8432130318).

Almost surely, 2^61000005011 is an apocalyptic number.

61000005011 is a deficient number, since it is larger than the sum of its proper divisors (6457037533).

61000005011 is a wasteful number, since it uses less digits than its factorization.

61000005011 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 75965221.

The product of its (nonzero) digits is 30, while the sum is 14.

Adding to 61000005011 its reverse (11050000016), we get a palindrome (72050005027).

The spelling of 61000005011 in words is "sixty-one billion, five thousand, eleven".