61968551 has 2 divisors, whose sum is σ = 61968552. Its totient is φ = 61968550.

The previous prime is 61968541. The next prime is 61968559. The reversal of 61968551 is 15586916.

61968551 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 61968551 - 2²² = 57774247 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 61968499 and 61968508.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (61968559) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 30984275 + 30984276.

It is an arithmetic number, because the mean of its divisors is an integer number (30984276).

Almost surely, 2^61968551 is an apocalyptic number.

61968551 is a deficient number, since it is larger than the sum of its proper divisors (1).

61968551 is an equidigital number, since it uses as much as digits as its factorization.

61968551 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 64800, while the sum is 41.

The square root of 61968551 is about 7872.0106072083. The cubic root of 61968551 is about 395.7222293632.

The spelling of 61968551 in words is "sixty-one million, nine hundred sixty-eight thousand, five hundred fifty-one".