1556135105 has 16 divisors (see below), whose sum is σ = 2138098944. Its totient is φ = 1065078720.

The previous prime is 1556135101. The next prime is 1556135123. The reversal of 1556135105 is 5015316551.

It is not a de Polignac number, because 1556135105 - 2² = 1556135101 is a prime.

It is a super-2 number, since 2×1556135105² = 4843112930026722050, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1556135101) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 22157 + ... + 60026.

It is an arithmetic number, because the mean of its divisors is an integer number (133631184).

Almost surely, 2^1556135105 is an apocalyptic number.

It is an amenable number.

1556135105 is a deficient number, since it is larger than the sum of its proper divisors (581963839).

1556135105 is an equidigital number, since it uses as much as digits as its factorization.

1556135105 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 82736.

The product of its (nonzero) digits is 11250, while the sum is 32.

The square root of 1556135105 is about 39447.8783333147. The cubic root of 1556135105 is about 1158.8194253798.

The spelling of 1556135105 in words is "one billion, five hundred fifty-six million, one hundred thirty-five thousand, one hundred five".