1555565460040 has 32 divisors (see below), whose sum is σ = 3536104997880. Its totient is φ = 615811479552.

The previous prime is 1555565460019. The next prime is 1555565460083. The reversal of 1555565460040 is 400645655551.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 1459027241604 + 96538218436 = 1207902^2 + 310706^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 200455587 + ... + 200463346.

Almost surely, 2^{1555565460040} is an apocalyptic number.

1555565460040 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1555565460040 is an abundant number, since it is smaller than the sum of its proper divisors (1980539537840).

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

1555565460040 is a wasteful number, since it uses less digits than its factorization.

1555565460040 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 400919041 (or 400919037 counting only the distinct ones).

The product of its (nonzero) digits is 1800000, while the sum is 46.

The spelling of 1555565460040 in words is "one trillion, five hundred fifty-five billion, five hundred sixty-five million, four hundred sixty thousand, forty".