1550511666656 has 24 divisors (see below), whose sum is σ = 3151039840704. Its totient is φ = 750247580160.

The previous prime is 1550511666637. The next prime is 1550511666709. The reversal of 1550511666656 is 6566661150551.

It is a junction number, because it is equal to n+sod(n) for n = 1550511666598 and 1550511666607.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 781506905 + ... + 781508888.

It is an arithmetic number, because the mean of its divisors is an integer number (131293326696).

Almost surely, 2^{1550511666656} is an apocalyptic number.

1550511666656 is a gapful number since it is divisible by the number (16) formed by its first and last digit.

It is an amenable number.

1550511666656 is an abundant number, since it is smaller than the sum of its proper divisors (1600528174048).

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

1550511666656 is a wasteful number, since it uses less digits than its factorization.

1550511666656 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1563015834 (or 1563015826 counting only the distinct ones).

The product of its (nonzero) digits is 4860000, while the sum is 53.

The spelling of 1550511666656 in words is "one trillion, five hundred fifty billion, five hundred eleven million, six hundred sixty-six thousand, six hundred fifty-six".