1055664477 has 42 divisors (see below), whose sum is σ = 1780772318. Its totient is φ = 602631792.

The previous prime is 1055664457. The next prime is 1055664479. The reversal of 1055664477 is 7744665501.

1055664477 is a `hidden beast` number, since 10 + 5 + 566 + 4 + 4 + 77 = 666.

It can be written as a sum of positive squares in only one way, i.e., 1017546201 + 38118276 = 31899^2 + 6174^2 .

It is not a de Polignac number, because 1055664477 - 2⁷ = 1055664349 is a prime.

It is a super-2 number, since 2×1055664477² = 2228854975999367058, 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 (1055664479) by changing a digit.

It is a polite number, since it can be written in 41 ways as a sum of consecutive naturals, for example, 1058343 + ... + 1059339.

Almost surely, 2^1055664477 is an apocalyptic number.

It is an amenable number.

1055664477 is a deficient number, since it is larger than the sum of its proper divisors (725107841).

1055664477 is an frugal number, since it uses more digits than its factorization.

1055664477 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1045 (or 1007 counting only the distinct ones).

The product of its (nonzero) digits is 705600, while the sum is 45.

The square root of 1055664477 is about 32490.9907051170. The cubic root of 1055664477 is about 1018.2208112789.

The spelling of 1055664477 in words is "one billion, fifty-five million, six hundred sixty-four thousand, four hundred seventy-seven".