1591616563043 has 4 divisors (see below), whose sum is σ = 1714048606368. Its totient is φ = 1469184519720.

The previous prime is 1591616563037. The next prime is 1591616563091. The reversal of 1591616563043 is 3403656161951.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 1591616563043 - 2¹⁶ = 1591616497507 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 1591616562982 and 1591616563000.

It is not an unprimeable number, because it can be changed into a prime (1591616563003) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 61216021643 + ... + 61216021668.

It is an arithmetic number, because the mean of its divisors is an integer number (428512151592).

Almost surely, 2^{1591616563043} is an apocalyptic number.

1591616563043 is a gapful number since it is divisible by the number (13) formed by its first and last digit.

1591616563043 is a deficient number, since it is larger than the sum of its proper divisors (122432043325).

1591616563043 is a wasteful number, since it uses less digits than its factorization.

1591616563043 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 122432043324.

The product of its (nonzero) digits is 1749600, while the sum is 50.

The spelling of 1591616563043 in words is "one trillion, five hundred ninety-one billion, six hundred sixteen million, five hundred sixty-three thousand, forty-three".