1455791779 has 16 divisors (see below), whose sum is σ = 1611459360. Its totient is φ = 1306863360.

The previous prime is 1455791767. The next prime is 1455791791. The reversal of 1455791779 is 9771975541.

It is an interprime number because it is at equal distance from previous prime (1455791767) and next prime (1455791791).

It is a cyclic number.

It is not a de Polignac number, because 1455791779 - 2⁵ = 1455791747 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1455791479) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 60264 + ... + 80890.

It is an arithmetic number, because the mean of its divisors is an integer number (100716210).

Almost surely, 2^1455791779 is an apocalyptic number.

1455791779 is a deficient number, since it is larger than the sum of its proper divisors (155667581).

1455791779 is a wasteful number, since it uses less digits than its factorization.

1455791779 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 20790.

The product of its digits is 2778300, while the sum is 55.

The square root of 1455791779 is about 38154.8395226608. The cubic root of 1455791779 is about 1133.3561897832.

The spelling of 1455791779 in words is "one billion, four hundred fifty-five million, seven hundred ninety-one thousand, seven hundred seventy-nine".