615941224891 has 2 divisors, whose sum is σ = 615941224892. Its totient is φ = 615941224890.

The previous prime is 615941224889. The next prime is 615941224909. The reversal of 615941224891 is 198422149516.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 615941224891 - 2¹ = 615941224889 is a prime.

Together with 615941224889, it forms a pair of twin primes.

It is not a weakly prime, because it can be changed into another prime (615941224391) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 307970612445 + 307970612446.

It is an arithmetic number, because the mean of its divisors is an integer number (307970612446).

Almost surely, 2^615941224891 is an apocalyptic number.

615941224891 is a deficient number, since it is larger than the sum of its proper divisors (1).

615941224891 is an equidigital number, since it uses as much as digits as its factorization.

615941224891 is an evil number, because the sum of its binary digits is even.

The product of its digits is 1244160, while the sum is 52.

The spelling of 615941224891 in words is "six hundred fifteen billion, nine hundred forty-one million, two hundred twenty-four thousand, eight hundred ninety-one".