1556113320 has 96 divisors (see below), whose sum is σ = 5231795400. Its totient is φ = 400651776.

The previous prime is 1556113313. The next prime is 1556113327. The reversal of 1556113320 is 233116551.

1556113320 is a `hidden beast` number, since 15 + 5 + 611 + 3 + 32 + 0 = 666.

It is an interprime number because it is at equal distance from previous prime (1556113313) and next prime (1556113327).

It can be written as a sum of positive squares in 4 ways, for example, as 996412356 + 559700964 = 31566^2 + 23658^2 .

It is not an unprimeable number, because it can be changed into a prime (1556113327) 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, 64087 + ... + 84966.

Almost surely, 2^1556113320 is an apocalyptic number.

1556113320 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1556113320 is an abundant number, since it is smaller than the sum of its proper divisors (3675682080).

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

1556113320 is a wasteful number, since it uses less digits than its factorization.

1556113320 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 149099 (or 149092 counting only the distinct ones).

The product of its (nonzero) digits is 2700, while the sum is 27.

The square root of 1556113320 is about 39447.6022084993. The cubic root of 1556113320 is about 1158.8140177518.

Adding to 1556113320 its reverse (233116551), we get a palindrome (1789229871).

The spelling of 1556113320 in words is "one billion, five hundred fifty-six million, one hundred thirteen thousand, three hundred twenty".