1653541566 has 16 divisors (see below), whose sum is σ = 3309408144. Its totient is φ = 550793024.

The previous prime is 1653541559. The next prime is 1653541667. The reversal of 1653541566 is 6651453561.

It is a super-3 number, since 3×1653541566³ (a number of 29 digits) contains 333 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 87561 + ... + 104756.

It is an arithmetic number, because the mean of its divisors is an integer number (206838009).

Almost surely, 2^1653541566 is an apocalyptic number.

1653541566 is an abundant number, since it is smaller than the sum of its proper divisors (1655866578).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

1653541566 is a wasteful number, since it uses less digits than its factorization.

1653541566 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 193755.

The product of its digits is 324000, while the sum is 42.

The square root of 1653541566 is about 40663.7623197854. The cubic root of 1653541566 is about 1182.5105901877.

The spelling of 1653541566 in words is "one billion, six hundred fifty-three million, five hundred forty-one thousand, five hundred sixty-six".