1551116166105 has 32 divisors (see below), whose sum is σ = 2708334299520. Its totient is φ = 751797562880.

The previous prime is 1551116166077. The next prime is 1551116166109. The reversal of 1551116166105 is 5016616111551.

It is not a de Polignac number, because 1551116166105 - 2⁸ = 1551116165849 is a prime.

It is a super-2 number, since 2×1551116166105² (a number of 25 digits) contains 22 as substring.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (1551116166109) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 1135812 + ... + 2095781.

It is an arithmetic number, because the mean of its divisors is an integer number (84635446860).

Almost surely, 2^{1551116166105} is an apocalyptic number.

1551116166105 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

1551116166105 is a deficient number, since it is larger than the sum of its proper divisors (1157218133415).

1551116166105 is a wasteful number, since it uses less digits than its factorization.

1551116166105 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3234521.

The product of its (nonzero) digits is 27000, while the sum is 39.

The spelling of 1551116166105 in words is "one trillion, five hundred fifty-one billion, one hundred sixteen million, one hundred sixty-six thousand, one hundred five".