1561453641055 has 16 divisors (see below), whose sum is σ = 2336096876544. Its totient is φ = 973373698080.

The previous prime is 1561453641017. The next prime is 1561453641107. The reversal of 1561453641055 is 5501463541651.

It is not a de Polignac number, because 1561453641055 - 2¹³ = 1561453632863 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 1561453640996 and 1561453641014.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 2027861487 + ... + 2027862256.

It is an arithmetic number, because the mean of its divisors is an integer number (146006054784).

Almost surely, 2^{1561453641055} is an apocalyptic number.

1561453641055 is a deficient number, since it is larger than the sum of its proper divisors (774643235489).

1561453641055 is a wasteful number, since it uses less digits than its factorization.

1561453641055 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4055723766.

The product of its (nonzero) digits is 1080000, while the sum is 46.

The spelling of 1561453641055 in words is "one trillion, five hundred sixty-one billion, four hundred fifty-three million, six hundred forty-one thousand, fifty-five".