1054577781 has 6 divisors (see below), whose sum is σ = 1523279030. Its totient is φ = 703051848.

The previous prime is 1054577773. The next prime is 1054577791. The reversal of 1054577781 is 1877754501.

1054577781 is a `hidden beast` number, since 1 + 0 + 5 + 4 + 577 + 78 + 1 = 666.

It can be written as a sum of positive squares in only one way, i.e., 1045487556 + 9090225 = 32334^2 + 3015^2 .

It is not a de Polignac number, because 1054577781 - 2³ = 1054577773 is a prime.

It is a super-2 number, since 2×1054577781² = 2224268592357767922, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1054577731) 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 5 ways as a sum of consecutive naturals, for example, 58587646 + ... + 58587663.

Almost surely, 2^1054577781 is an apocalyptic number.

It is an amenable number.

1054577781 is a deficient number, since it is larger than the sum of its proper divisors (468701249).

1054577781 is a wasteful number, since it uses less digits than its factorization.

1054577781 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 117175315 (or 117175312 counting only the distinct ones).

The product of its (nonzero) digits is 274400, while the sum is 45.

The square root of 1054577781 is about 32474.2633634698. The cubic root of 1054577781 is about 1017.8713074362.

The spelling of 1054577781 in words is "one billion, fifty-four million, five hundred seventy-seven thousand, seven hundred eighty-one".