654234220640 has 384 divisors, whose sum is σ = 2197331877888. Its totient is φ = 177158062080.

The previous prime is 654234220621. The next prime is 654234220643. The reversal of 654234220640 is 46022432456.

It is a junction number, because it is equal to n+sod(n) for n = 654234220594 and 654234220603.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (654234220643) by changing a digit.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 2602577 + ... + 2842863.

It is an arithmetic number, because the mean of its divisors is an integer number (5722218432).

Almost surely, 2^654234220640 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 654234220640, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1098665938944).

654234220640 is an abundant number, since it is smaller than the sum of its proper divisors (1543097657248).

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

654234220640 is a wasteful number, since it uses less digits than its factorization.

654234220640 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 240350 (or 240342 counting only the distinct ones).

The product of its (nonzero) digits is 276480, while the sum is 38.

The spelling of 654234220640 in words is "six hundred fifty-four billion, two hundred thirty-four million, two hundred twenty thousand, six hundred forty".