1357781361 has 8 divisors (see below), whose sum is σ = 1821482400. Its totient is φ = 899633952.

The previous prime is 1357781357. The next prime is 1357781377. The reversal of 1357781361 is 1631877531.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 1357781361 - 2² = 1357781357 is a prime.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (1357781561) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1387836 + ... + 1388813.

It is an arithmetic number, because the mean of its divisors is an integer number (227685300).

Almost surely, 2^1357781361 is an apocalyptic number.

It is an amenable number.

1357781361 is a deficient number, since it is larger than the sum of its proper divisors (463701039).

1357781361 is a wasteful number, since it uses less digits than its factorization.

1357781361 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2776815.

The product of its digits is 105840, while the sum is 42.

The square root of 1357781361 is about 36848.0849027463. The cubic root of 1357781361 is about 1107.3288478559.

The spelling of 1357781361 in words is "one billion, three hundred fifty-seven million, seven hundred eighty-one thousand, three hundred sixty-one".