1356956019 has 12 divisors (see below), whose sum is σ = 2013022336. Its totient is φ = 880187472.

The previous prime is 1356956017. The next prime is 1356956021. The reversal of 1356956019 is 9106596531.

1356956019 is a `hidden beast` number, since 1 + 35 + 6 + 9 + 5 + 601 + 9 = 666.

It is an interprime number because it is at equal distance from previous prime (1356956017) and next prime (1356956021).

It is not a de Polignac number, because 1356956019 - 2¹ = 1356956017 is a prime.

It is a super-2 number, since 2×1356956019² = 3682659275000656722, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1356956017) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 2037139 + ... + 2037804.

Almost surely, 2^1356956019 is an apocalyptic number.

1356956019 is a deficient number, since it is larger than the sum of its proper divisors (656066317).

1356956019 is a wasteful number, since it uses less digits than its factorization.

1356956019 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4074986 (or 4074983 counting only the distinct ones).

The product of its (nonzero) digits is 218700, while the sum is 45.

The square root of 1356956019 is about 36836.8839480214. The cubic root of 1356956019 is about 1107.1044351302.

The spelling of 1356956019 in words is "one billion, three hundred fifty-six million, nine hundred fifty-six thousand, nineteen".