1555696255 has 4 divisors (see below), whose sum is σ = 1866835512. Its totient is φ = 1244557000.

The previous prime is 1555696253. The next prime is 1555696277. The reversal of 1555696255 is 5526965551.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 5526965551 = 29 ⋅190585019.

It is not a de Polignac number, because 1555696255 - 2¹ = 1555696253 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 1555696199 and 1555696208.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1555696253) 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, 155569621 + ... + 155569630.

It is an arithmetic number, because the mean of its divisors is an integer number (466708878).

Almost surely, 2^1555696255 is an apocalyptic number.

1555696255 is a deficient number, since it is larger than the sum of its proper divisors (311139257).

1555696255 is an equidigital number, since it uses as much as digits as its factorization.

1555696255 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 311139256.

The product of its digits is 2025000, while the sum is 49.

The square root of 1555696255 is about 39442.3155380107. The cubic root of 1555696255 is about 1158.7104811721.

The spelling of 1555696255 in words is "one billion, five hundred fifty-five million, six hundred ninety-six thousand, two hundred fifty-five".