561962054477 has 2 divisors, whose sum is σ = 561962054478. Its totient is φ = 561962054476.

The previous prime is 561962054431. The next prime is 561962054501. The reversal of 561962054477 is 774450269165.

It is a happy number.

561962054477 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 can be written as a sum of positive squares in only one way, i.e., 286852363396 + 275109691081 = 535586^2 + 524509^2 .

It is a cyclic number.

It is not a de Polignac number, because 561962054477 - 2⁸ = 561962054221 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (561962054177) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 280981027238 + 280981027239.

It is an arithmetic number, because the mean of its divisors is an integer number (280981027239).

Almost surely, 2^561962054477 is an apocalyptic number.

It is an amenable number.

561962054477 is a deficient number, since it is larger than the sum of its proper divisors (1).

561962054477 is an equidigital number, since it uses as much as digits as its factorization.

561962054477 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 12700800, while the sum is 56.

The spelling of 561962054477 in words is "five hundred sixty-one billion, nine hundred sixty-two million, fifty-four thousand, four hundred seventy-seven".