654998077440 has 1536 divisors, whose sum is σ = 2826582220800. Its totient is φ = 137027911680.

The previous prime is 654998077421. The next prime is 654998077477. The reversal of 654998077440 is 44770899456.

654998077440 is a `hidden beast` number, since 6 + 5 + 49 + 9 + 80 + 77 + 440 = 666.

It is a tau number, because it is divible by the number of its divisors (1536).

It is a Harshad number since it is a multiple of its sum of digits (63).

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 95 ways as a sum of consecutive naturals, for example, 7359528916 + ... + 7359529004.

It is an arithmetic number, because the mean of its divisors is an integer number (1840222800).

Almost surely, 2^654998077440 is an apocalyptic number.

654998077440 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 654998077440, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1413291110400).

654998077440 is an abundant number, since it is smaller than the sum of its proper divisors (2171584143360).

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

654998077440 is a wasteful number, since it uses less digits than its factorization.

654998077440 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 191 (or 160 counting only the distinct ones).

The product of its (nonzero) digits is 60963840, while the sum is 63.

The spelling of 654998077440 in words is "six hundred fifty-four billion, nine hundred ninety-eight million, seventy-seven thousand, four hundred forty".