1620072055 has 12 divisors (see below), whose sum is σ = 2261488680. Its totient is φ = 1110906384.

The previous prime is 1620072029. The next prime is 1620072079. The reversal of 1620072055 is 5502700261.

It is not a de Polignac number, because 1620072055 - 2⁹ = 1620071543 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 3306025 + ... + 3306514.

It is an arithmetic number, because the mean of its divisors is an integer number (188457390).

Almost surely, 2^1620072055 is an apocalyptic number.

1620072055 is a deficient number, since it is larger than the sum of its proper divisors (641416625).

1620072055 is an equidigital number, since it uses as much as digits as its factorization.

1620072055 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6612558 (or 6612551 counting only the distinct ones).

The product of its (nonzero) digits is 4200, while the sum is 28.

The square root of 1620072055 is about 40250.1186954772. The cubic root of 1620072055 is about 1174.4777047955.

The spelling of 1620072055 in words is "one billion, six hundred twenty million, seventy-two thousand, fifty-five".