2054491566 has 16 divisors (see below), whose sum is σ = 4136562000. Its totient is φ = 680234048.

The previous prime is 2054491553. The next prime is 2054491567. The reversal of 2054491566 is 6651944502.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2054491567) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1148151 + ... + 1149938.

It is an arithmetic number, because the mean of its divisors is an integer number (258535125).

Almost surely, 2^2054491566 is an apocalyptic number.

2054491566 is an abundant number, since it is smaller than the sum of its proper divisors (2082070434).

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

2054491566 is a wasteful number, since it uses less digits than its factorization.

2054491566 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2298243.

The product of its (nonzero) digits is 259200, while the sum is 42.

The square root of 2054491566 is about 45326.4996001235. The cubic root of 2054491566 is about 1271.2611866492.

The spelling of 2054491566 in words is "two billion, fifty-four million, four hundred ninety-one thousand, five hundred sixty-six".