1556168616552 has 32 divisors (see below), whose sum is σ = 4244096227680. Its totient is φ = 471566247360.

The previous prime is 1556168616523. The next prime is 1556168616571. The reversal of 1556168616552 is 2556168616551.

It is a junction number, because it is equal to n+sod(n) for n = 1556168616492 and 1556168616501.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2947288783 + ... + 2947289310.

It is an arithmetic number, because the mean of its divisors is an integer number (132628007115).

Almost surely, 2^{1556168616552} is an apocalyptic number.

1556168616552 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

1556168616552 is an abundant number, since it is smaller than the sum of its proper divisors (2687927611128).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

1556168616552 is a wasteful number, since it uses less digits than its factorization.

1556168616552 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5894578113 (or 5894578109 counting only the distinct ones).

The product of its digits is 12960000, while the sum is 57.

Subtracting 1556168616552 from its reverse (2556168616551), we obtain a palindrome (999999999999).

The spelling of 1556168616552 in words is "one trillion, five hundred fifty-six billion, one hundred sixty-eight million, six hundred sixteen thousand, five hundred fifty-two".