1368819261 has 24 divisors (see below), whose sum is σ = 2083710720. Its totient is φ = 863493696.

The previous prime is 1368819259. The next prime is 1368819323. The reversal of 1368819261 is 1629188631.

It is not a de Polignac number, because 1368819261 - 2¹ = 1368819259 is a prime.

It is a super-2 number, since 2×1368819261² = 3747332338569172242, which contains 22 as substring.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1368819061) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 155956 + ... + 164498.

It is an arithmetic number, because the mean of its divisors is an integer number (86821280).

Almost surely, 2^1368819261 is an apocalyptic number.

It is an amenable number.

1368819261 is a deficient number, since it is larger than the sum of its proper divisors (714891459).

1368819261 is a wasteful number, since it uses less digits than its factorization.

1368819261 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9505 (or 9502 counting only the distinct ones).

The product of its digits is 124416, while the sum is 45.

The square root of 1368819261 is about 36997.5575004621. The cubic root of 1368819261 is about 1110.3213800361.

The spelling of 1368819261 in words is "one billion, three hundred sixty-eight million, eight hundred nineteen thousand, two hundred sixty-one".