1555136361 has 8 divisors (see below), whose sum is σ = 2303905760. Its totient is φ = 1036757556.

The previous prime is 1555136311. The next prime is 1555136369. The reversal of 1555136361 is 1636315551.

1555136361 is a `hidden beast` number, since 1 + 5 + 5 + 5 + 13 + 636 + 1 = 666.

It is not a de Polignac number, because 1555136361 - 2⁹ = 1555135849 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1555136369) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 28798795 + ... + 28798848.

It is an arithmetic number, because the mean of its divisors is an integer number (287988220).

Almost surely, 2^1555136361 is an apocalyptic number.

It is an amenable number.

1555136361 is a deficient number, since it is larger than the sum of its proper divisors (748769399).

1555136361 is an equidigital number, since it uses as much as digits as its factorization.

1555136361 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 57597652 (or 57597646 counting only the distinct ones).

The product of its digits is 40500, while the sum is 36.

The square root of 1555136361 is about 39435.2172683250. The cubic root of 1555136361 is about 1158.5714581273.

The spelling of 1555136361 in words is "one billion, five hundred fifty-five million, one hundred thirty-six thousand, three hundred sixty-one".