654561644 has 12 divisors (see below), whose sum is σ = 1249617768. Its totient is φ = 297528000.

The previous prime is 654561617. The next prime is 654561671. The reversal of 654561644 is 446165456.

It is an interprime number because it is at equal distance from previous prime (654561617) and next prime (654561671).

It is a super-3 number, since 3×654561644³ (a number of 27 digits) contains 333 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 7438157 + ... + 7438244.

It is an arithmetic number, because the mean of its divisors is an integer number (104134814).

Almost surely, 2^654561644 is an apocalyptic number.

It is an amenable number.

654561644 is a deficient number, since it is larger than the sum of its proper divisors (595056124).

654561644 is a wasteful number, since it uses less digits than its factorization.

654561644 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 14876416 (or 14876414 counting only the distinct ones).

The product of its digits is 345600, while the sum is 41.

The square root of 654561644 is about 25584.4023576866. The cubic root of 654561644 is about 868.2607805138.

The spelling of 654561644 in words is "six hundred fifty-four million, five hundred sixty-one thousand, six hundred forty-four".