1561411754643 has 16 divisors (see below), whose sum is σ = 2242087858080. Its totient is φ = 960842747904.

The previous prime is 1561411754597. The next prime is 1561411754657. The reversal of 1561411754643 is 3464571141651.

It is not a de Polignac number, because 1561411754643 - 2⁸ = 1561411754387 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 1561411754592 and 1561411754601.

It is not an unprimeable number, because it can be changed into a prime (1561411754543) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 969613 + ... + 2015681.

It is an arithmetic number, because the mean of its divisors is an integer number (140130491130).

Almost surely, 2^{1561411754643} is an apocalyptic number.

1561411754643 is a gapful number since it is divisible by the number (13) formed by its first and last digit.

1561411754643 is a deficient number, since it is larger than the sum of its proper divisors (680676103437).

1561411754643 is a wasteful number, since it uses less digits than its factorization.

1561411754643 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1084358.

The product of its digits is 1209600, while the sum is 48.

The spelling of 1561411754643 in words is "one trillion, five hundred sixty-one billion, four hundred eleven million, seven hundred fifty-four thousand, six hundred forty-three".