1555104953 has 4 divisors (see below), whose sum is σ = 1555292148. Its totient is φ = 1554917760.

The previous prime is 1555104899. The next prime is 1555104973. The reversal of 1555104953 is 3594015551.

It is a happy number.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 1230816889 + 324288064 = 35083^2 + 18008^2 .

It is a cyclic number.

It is not a de Polignac number, because 1555104953 - 2²⁶ = 1487996089 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1555104973) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 80528 + ... + 97953.

It is an arithmetic number, because the mean of its divisors is an integer number (388823037).

Almost surely, 2^1555104953 is an apocalyptic number.

It is an amenable number.

1555104953 is a deficient number, since it is larger than the sum of its proper divisors (187195).

1555104953 is an equidigital number, since it uses as much as digits as its factorization.

1555104953 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 187194.

The product of its (nonzero) digits is 67500, while the sum is 38.

The square root of 1555104953 is about 39434.8190435813. The cubic root of 1555104953 is about 1158.5636584560.

The spelling of 1555104953 in words is "one billion, five hundred fifty-five million, one hundred four thousand, nine hundred fifty-three".