61428082477 has 2 divisors, whose sum is σ = 61428082478. Its totient is φ = 61428082476.

The previous prime is 61428082381. The next prime is 61428082481. The reversal of 61428082477 is 77428082416.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 38775123396 + 22652959081 = 196914^2 + 150509^2 .

It is a cyclic number.

It is not a de Polignac number, because 61428082477 - 2⁷ = 61428082349 is a prime.

It is a super-2 number, since 2×61428082477² (a number of 22 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 61428082477.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (61428482477) 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 as a sum of consecutive naturals, namely, 30714041238 + 30714041239.

It is an arithmetic number, because the mean of its divisors is an integer number (30714041239).

Almost surely, 2^61428082477 is an apocalyptic number.

It is an amenable number.

61428082477 is a deficient number, since it is larger than the sum of its proper divisors (1).

61428082477 is an equidigital number, since it uses as much as digits as its factorization.

61428082477 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1204224, while the sum is 49.

The spelling of 61428082477 in words is "sixty-one billion, four hundred twenty-eight million, eighty-two thousand, four hundred seventy-seven".