61244335511 has 2 divisors, whose sum is σ = 61244335512. Its totient is φ = 61244335510.

The previous prime is 61244335499. The next prime is 61244335547. The reversal of 61244335511 is 11553344216.

61244335511 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-61244335511 is a prime.

It is a super-2 number, since 2×61244335511² (a number of 22 digits) contains 22 as substring.

It is a Sophie Germain prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (61244385511) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 30622167755 + 30622167756.

It is an arithmetic number, because the mean of its divisors is an integer number (30622167756).

Almost surely, 2^61244335511 is an apocalyptic number.

61244335511 is a deficient number, since it is larger than the sum of its proper divisors (1).

61244335511 is an equidigital number, since it uses as much as digits as its factorization.

61244335511 is an evil number, because the sum of its binary digits is even.

The product of its digits is 43200, while the sum is 35.

Adding to 61244335511 its reverse (11553344216), we get a palindrome (72797679727).

The spelling of 61244335511 in words is "sixty-one billion, two hundred forty-four million, three hundred thirty-five thousand, five hundred eleven".