1620386145293 has 2 divisors, whose sum is σ = 1620386145294. Its totient is φ = 1620386145292.

The previous prime is 1620386145277. The next prime is 1620386145319. The reversal of 1620386145293 is 3925416830261.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1400525499844 + 219860645449 = 1183438^2 + 468893^2 .

It is an emirp because it is prime and its reverse (3925416830261) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 1620386145293 - 2⁴ = 1620386145277 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1620386145253) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 810193072646 + 810193072647.

It is an arithmetic number, because the mean of its divisors is an integer number (810193072647).

Almost surely, 2^{1620386145293} is an apocalyptic number.

It is an amenable number.

1620386145293 is a deficient number, since it is larger than the sum of its proper divisors (1).

1620386145293 is an equidigital number, since it uses as much as digits as its factorization.

1620386145293 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1866240, while the sum is 50.

The spelling of 1620386145293 in words is "one trillion, six hundred twenty billion, three hundred eighty-six million, one hundred forty-five thousand, two hundred ninety-three".