654198938406 has 96 divisors (see below), whose sum is σ = 1619071534080. Its totient is φ = 189241790400.

The previous prime is 654198938363. The next prime is 654198938411. The reversal of 654198938406 is 604839891456.

654198938406 is a `hidden beast` number, since 6 + 5 + 4 + 198 + 9 + 38 + 406 = 666.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 20811 + ... + 1144041.

It is an arithmetic number, because the mean of its divisors is an integer number (16865328480).

Almost surely, 2^654198938406 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 654198938406, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (809535767040).

654198938406 is an abundant number, since it is smaller than the sum of its proper divisors (964872595674).

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

654198938406 is a wasteful number, since it uses less digits than its factorization.

654198938406 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1123402 (or 1123399 counting only the distinct ones).

The product of its (nonzero) digits is 44789760, while the sum is 63.

The spelling of 654198938406 in words is "six hundred fifty-four billion, one hundred ninety-eight million, nine hundred thirty-eight thousand, four hundred six".