1555166140 has 24 divisors (see below), whose sum is σ = 3562744752. Its totient is φ = 565514880.

The previous prime is 1555166117. The next prime is 1555166159. The reversal of 1555166140 is 416615551.

It is a junction number, because it is equal to n+sod(n) for n = 1555166096 and 1555166105.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3534249 + ... + 3534688.

It is an arithmetic number, because the mean of its divisors is an integer number (148447698).

Almost surely, 2^1555166140 is an apocalyptic number.

1555166140 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1555166140 is an abundant number, since it is smaller than the sum of its proper divisors (2007578612).

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

1555166140 is a wasteful number, since it uses less digits than its factorization.

1555166140 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7068957 (or 7068955 counting only the distinct ones).

The product of its (nonzero) digits is 18000, while the sum is 34.

The square root of 1555166140 is about 39435.5948351233. The cubic root of 1555166140 is about 1158.5788531657.

It can be divided in two parts, 15 and 55166140, that added together give a palindrome (55166155).

The spelling of 1555166140 in words is "one billion, five hundred fifty-five million, one hundred sixty-six thousand, one hundred forty".