1005166215550 has 48 divisors (see below), whose sum is σ = 2136828805632. Its totient is φ = 344607026400.

The previous prime is 1005166215509. The next prime is 1005166215553. The reversal of 1005166215550 is 555126615001.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1005166215553) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 6188679 + ... + 6349021.

It is an arithmetic number, because the mean of its divisors is an integer number (44517266784).

Almost surely, 2^{1005166215550} is an apocalyptic number.

1005166215550 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

1005166215550 is an abundant number, since it is smaller than the sum of its proper divisors (1131662590082).

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

1005166215550 is a wasteful number, since it uses less digits than its factorization.

1005166215550 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 178273 (or 178268 counting only the distinct ones).

The product of its (nonzero) digits is 45000, while the sum is 37.

The spelling of 1005166215550 in words is "one trillion, five billion, one hundred sixty-six million, two hundred fifteen thousand, five hundred fifty".