1054573661 has 4 divisors (see below), whose sum is σ = 1090938300. Its totient is φ = 1018209024.

The previous prime is 1054573633. The next prime is 1054573691. The reversal of 1054573661 is 1663754501.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 686125636 + 368448025 = 26194^2 + 19195^2 .

It is a de Polignac number, because none of the positive numbers 2^k-1054573661 is a prime.

It is a super-2 number, since 2×1054573661² = 2224251212949885842, 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 (1054573601) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 18182276 + ... + 18182333.

It is an arithmetic number, because the mean of its divisors is an integer number (272734575).

Almost surely, 2^1054573661 is an apocalyptic number.

It is an amenable number.

1054573661 is a deficient number, since it is larger than the sum of its proper divisors (36364639).

1054573661 is an equidigital number, since it uses as much as digits as its factorization.

1054573661 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 36364638.

The product of its (nonzero) digits is 75600, while the sum is 38.

The square root of 1054573661 is about 32474.1999285587. The cubic root of 1054573661 is about 1017.8699819025.

The spelling of 1054573661 in words is "one billion, fifty-four million, five hundred seventy-three thousand, six hundred sixty-one".