1555940116 has 12 divisors (see below), whose sum is σ = 2733019380. Its totient is φ = 775077440.

The previous prime is 1555940101. The next prime is 1555940117. The reversal of 1555940116 is 6110495551.

It can be written as a sum of positive squares in 2 ways, for example, as 817731216 + 738208900 = 28596^2 + 27170^2 .

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1555940117) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 721945 + ... + 724096.

It is an arithmetic number, because the mean of its divisors is an integer number (227751615).

Almost surely, 2^1555940116 is an apocalyptic number.

It is an amenable number.

1555940116 is a deficient number, since it is larger than the sum of its proper divisors (1177079264).

1555940116 is a wasteful number, since it uses less digits than its factorization.

1555940116 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1446314 (or 1446312 counting only the distinct ones).

The product of its (nonzero) digits is 27000, while the sum is 37.

The square root of 1555940116 is about 39445.4067794972. The cubic root of 1555940116 is about 1158.7710220249.

The spelling of 1555940116 in words is "one billion, five hundred fifty-five million, nine hundred forty thousand, one hundred sixteen".