61113332551 has 2 divisors, whose sum is σ = 61113332552. Its totient is φ = 61113332550.

The previous prime is 61113332549. The next prime is 61113332633. The reversal of 61113332551 is 15523331116.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 61113332551 - 2¹ = 61113332549 is a prime.

Together with 61113332549, it forms a pair of twin primes.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (61113332531) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 30556666275 + 30556666276.

It is an arithmetic number, because the mean of its divisors is an integer number (30556666276).

Almost surely, 2^61113332551 is an apocalyptic number.

61113332551 is a deficient number, since it is larger than the sum of its proper divisors (1).

61113332551 is an equidigital number, since it uses as much as digits as its factorization.

61113332551 is an evil number, because the sum of its binary digits is even.

The product of its digits is 8100, while the sum is 31.

Adding to 61113332551 its reverse (15523331116), we get a palindrome (76636663667).

The spelling of 61113332551 in words is "sixty-one billion, one hundred thirteen million, three hundred thirty-two thousand, five hundred fifty-one".