1615845203243 has 2 divisors, whose sum is σ = 1615845203244. Its totient is φ = 1615845203242.

The previous prime is 1615845203123. The next prime is 1615845203299. The reversal of 1615845203243 is 3423025485161.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 1615845203243 - 2¹⁰ = 1615845202219 is a prime.

It is a super-2 number, since 2×1615845203243² (a number of 25 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 1615845203194 and 1615845203203.

It is not a weakly prime, because it can be changed into another prime (1615845283243) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 807922601621 + 807922601622.

It is an arithmetic number, because the mean of its divisors is an integer number (807922601622).

Almost surely, 2^{1615845203243} is an apocalyptic number.

1615845203243 is a deficient number, since it is larger than the sum of its proper divisors (1).

1615845203243 is an equidigital number, since it uses as much as digits as its factorization.

1615845203243 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 691200, while the sum is 44.

The spelling of 1615845203243 in words is "one trillion, six hundred fifteen billion, eight hundred forty-five million, two hundred three thousand, two hundred forty-three".