654043991040 has 1056 divisors, whose sum is σ = 2600802912960. Its totient is φ = 155713536000.

The previous prime is 654043991011. The next prime is 654043991077. The reversal of 654043991040 is 40199340456.

654043991040 is a `hidden beast` number, since 6 + 540 + 4 + 3 + 99 + 10 + 4 + 0 = 666.

It is a tau number, because it is divible by the number of its divisors (1056).

It is a Harshad number since it is a multiple of its sum of digits (45).

It is an unprimeable number.

It is a polite number, since it can be written in 95 ways as a sum of consecutive naturals, for example, 1020349120 + ... + 1020349760.

Almost surely, 2^654043991040 is an apocalyptic number.

654043991040 is a gapful number since it is divisible by the number (60) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 654043991040, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1300401456480).

654043991040 is an abundant number, since it is smaller than the sum of its proper divisors (1946758921920).

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

654043991040 is a wasteful number, since it uses less digits than its factorization.

654043991040 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 758 (or 723 counting only the distinct ones).

The product of its (nonzero) digits is 466560, while the sum is 45.

The spelling of 654043991040 in words is "six hundred fifty-four billion, forty-three million, nine hundred ninety-one thousand, forty".