268155619 has 2 divisors, whose sum is σ = 268155620. Its totient is φ = 268155618.

The previous prime is 268155617. The next prime is 268155661. The reversal of 268155619 is 916551862.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 268155619 - 2¹ = 268155617 is a prime.

It is a super-2 number, since 2×268155619² = 143814872002546322, which contains 22 as substring.

Together with 268155617, it forms a pair of twin primes.

It is not a weakly prime, because it can be changed into another prime (268155617) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 134077809 + 134077810.

It is an arithmetic number, because the mean of its divisors is an integer number (134077810).

Almost surely, 2^268155619 is an apocalyptic number.

268155619 is a deficient number, since it is larger than the sum of its proper divisors (1).

268155619 is an equidigital number, since it uses as much as digits as its factorization.

268155619 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 129600, while the sum is 43.

The square root of 268155619 is about 16375.4578256609. The cubic root of 268155619 is about 644.8553400318.

The spelling of 268155619 in words is "two hundred sixty-eight million, one hundred fifty-five thousand, six hundred nineteen".