1620623254275 has 72 divisors (see below), whose sum is σ = 2910885120000. Its totient is φ = 861902216640.

The previous prime is 1620623254267. The next prime is 1620623254319. The reversal of 1620623254275 is 5724523260261.

1620623254275 is a `hidden beast` number, since 1 + 6 + 2 + 0 + 6 + 2 + 32 + 542 + 75 = 666.

It is not a de Polignac number, because 1620623254275 - 2³ = 1620623254267 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is a self number, because there is not a number n which added to its sum of digits gives 1620623254275.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 71 ways as a sum of consecutive naturals, for example, 266590686 + ... + 266596764.

It is an arithmetic number, because the mean of its divisors is an integer number (40428960000).

Almost surely, 2^{1620623254275} is an apocalyptic number.

1620623254275 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

1620623254275 is a deficient number, since it is larger than the sum of its proper divisors (1290261865725).

1620623254275 is a wasteful number, since it uses less digits than its factorization.

1620623254275 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9233 (or 9225 counting only the distinct ones).

The product of its (nonzero) digits is 1209600, while the sum is 45.

The spelling of 1620623254275 in words is "one trillion, six hundred twenty billion, six hundred twenty-three million, two hundred fifty-four thousand, two hundred seventy-five".