1954283773849 has 27 divisors (see below), whose sum is σ = 2163880385023. Its totient is φ = 1763662551200.

The previous prime is 1954283773843. The next prime is 1954283773903. The reversal of 1954283773849 is 9483773824591.

The square root of 1954283773849 is 1397957.

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

It can be written as a sum of positive squares in only one way, i.e., 5132719449 + 1949151054400 = 71643^2 + 1396120^2 .

It is not a de Polignac number, because 1954283773849 - 2¹⁷ = 1954283642777 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1954283773843) by changing a digit.

It is a polite number, since it can be written in 26 ways as a sum of consecutive naturals, for example, 2568046629 + ... + 2568047389.

Almost surely, 2^{1954283773849} is an apocalyptic number.

1954283773849 is the 1397957-th square number.

1954283773849 is the 698979-th centered octagonal number.

It is an amenable number.

1954283773849 is a deficient number, since it is larger than the sum of its proper divisors (209596611174).

1954283773849 is an frugal number, since it uses more digits than its factorization.

1954283773849 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1878 (or 939 counting only the distinct ones).

The product of its digits is 365783040, while the sum is 70.

The spelling of 1954283773849 in words is "one trillion, nine hundred fifty-four billion, two hundred eighty-three million, seven hundred seventy-three thousand, eight hundred forty-nine".