1620774255 has 32 divisors (see below), whose sum is σ = 2621963520. Its totient is φ = 854873600.

The previous prime is 1620774247. The next prime is 1620774289. The reversal of 1620774255 is 5524770261.

1620774255 is digitally balanced in base 4, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 1620774255 - 2³ = 1620774247 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 1116280 + ... + 1117730.

It is an arithmetic number, because the mean of its divisors is an integer number (81936360).

Almost surely, 2^1620774255 is an apocalyptic number.

1620774255 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

1620774255 is a deficient number, since it is larger than the sum of its proper divisors (1001189265).

1620774255 is a wasteful number, since it uses less digits than its factorization.

1620774255 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2231.

The product of its (nonzero) digits is 117600, while the sum is 39.

The square root of 1620774255 is about 40258.8407061108. The cubic root of 1620774255 is about 1174.6473678496.

The spelling of 1620774255 in words is "one billion, six hundred twenty million, seven hundred seventy-four thousand, two hundred fifty-five".