1620265455 has 24 divisors (see below), whose sum is σ = 2820742080. Its totient is φ = 860362560.

The previous prime is 1620265453. The next prime is 1620265459. The reversal of 1620265455 is 5545620261.

1620265455 is a `hidden beast` number, since 1 + 620 + 26 + 5 + 4 + 5 + 5 = 666.

1620265455 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 1620265455 - 2¹ = 1620265453 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1620265453) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 68311 + ... + 88920.

It is an arithmetic number, because the mean of its divisors is an integer number (117530920).

Almost surely, 2^1620265455 is an apocalyptic number.

1620265455 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

1620265455 is a deficient number, since it is larger than the sum of its proper divisors (1200476625).

1620265455 is a wasteful number, since it uses less digits than its factorization.

1620265455 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 157471 (or 157468 counting only the distinct ones).

The product of its (nonzero) digits is 72000, while the sum is 36.

The square root of 1620265455 is about 40252.5211011683. The cubic root of 1620265455 is about 1174.5244383033.

The spelling of 1620265455 in words is "one billion, six hundred twenty million, two hundred sixty-five thousand, four hundred fifty-five".