61801084011 has 32 divisors (see below), whose sum is σ = 87944927040. Its totient is φ = 38468059136.

The previous prime is 61801083991. The next prime is 61801084031. The reversal of 61801084011 is 11048010816.

It is an interprime number because it is at equal distance from previous prime (61801083991) and next prime (61801084031).

It is not a de Polignac number, because 61801084011 - 2⁶ = 61801083947 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 61801084011.

It is not an unprimeable number, because it can be changed into a prime (61801084031) 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 31 ways as a sum of consecutive naturals, for example, 18562795 + ... + 18566123.

It is an arithmetic number, because the mean of its divisors is an integer number (2748278970).

Almost surely, 2^61801084011 is an apocalyptic number.

61801084011 is a deficient number, since it is larger than the sum of its proper divisors (26143843029).

61801084011 is a wasteful number, since it uses less digits than its factorization.

61801084011 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6143.

The product of its (nonzero) digits is 1536, while the sum is 30.

Adding to 61801084011 its reverse (11048010816), we get a palindrome (72849094827).

The spelling of 61801084011 in words is "sixty-one billion, eight hundred one million, eighty-four thousand, eleven".