1556340111045 has 24 divisors (see below), whose sum is σ = 2797569386976. Its totient is φ = 830048058576.

The previous prime is 1556340111043. The next prime is 1556340111059. The reversal of 1556340111045 is 5401110436551.

1556340111045 is a `hidden beast` number, since 1 + 5 + 5 + 634 + 0 + 1 + 1 + 10 + 4 + 5 = 666.

It is not a de Polignac number, because 1556340111045 - 2¹ = 1556340111043 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1556340111043) 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, 640467967 + ... + 640470396.

It is an arithmetic number, because the mean of its divisors is an integer number (116565391124).

Almost surely, 2^{1556340111045} is an apocalyptic number.

1556340111045 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

1556340111045 is a deficient number, since it is larger than the sum of its proper divisors (1241229275931).

1556340111045 is an equidigital number, since it uses as much as digits as its factorization.

1556340111045 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1280938383 (or 1280938371 counting only the distinct ones).

The product of its (nonzero) digits is 36000, while the sum is 36.

Adding to 1556340111045 its reverse (5401110436551), we get a palindrome (6957450547596).

The spelling of 1556340111045 in words is "one trillion, five hundred fifty-six billion, three hundred forty million, one hundred eleven thousand, forty-five".