919406746449 has 27 divisors (see below), whose sum is σ = 1359817618107. Its totient is φ = 598602918816.

The previous prime is 919406746439. The next prime is 919406746483. The reversal of 919406746449 is 944647604919.

The square root of 919406746449 is 958857.

It is a perfect power (a square), and thus also a powerful number.

919406746449 is a `hidden beast` number, since 9 + 1 + 94 + 0 + 67 + 46 + 449 = 666.

It can be written as a sum of positive squares in only one way, i.e., 54819198225 + 864587548224 = 234135^2 + 929832^2 .

It is not a de Polignac number, because 919406746449 - 2²¹ = 919404649297 is a prime.

It is not an unprimeable number, because it can be changed into a prime (919406746429) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 26 ways as a sum of consecutive naturals, for example, 123688837 + ... + 123696269.

Almost surely, 2^919406746449 is an apocalyptic number.

919406746449 is the 958857-th square number.

919406746449 is the 479429-th centered octagonal number.

It is an amenable number.

919406746449 is a deficient number, since it is larger than the sum of its proper divisors (440410871658).

919406746449 is an frugal number, since it uses more digits than its factorization.

919406746449 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 14958 (or 7479 counting only the distinct ones).

The product of its (nonzero) digits is 47029248, while the sum is 63.

The spelling of 919406746449 in words is "nine hundred nineteen billion, four hundred six million, seven hundred forty-six thousand, four hundred forty-nine".