1655054640 has 80 divisors (see below), whose sum is σ = 5700751200. Its totient is φ = 441347328.

The previous prime is 1655054617. The next prime is 1655054651. The reversal of 1655054640 is 464505561.

1655054640 is a `hidden beast` number, since 1 + 6 + 5 + 5 + 0 + 5 + 4 + 640 = 666.

It is a tau number, because it is divible by the number of its divisors (80).

It is a super-2 number, since 2×1655054640² = 5478411722771059200, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a junction number, because it is equal to n+sod(n) for n = 1655054595 and 1655054604.

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 15 ways as a sum of consecutive naturals, for example, 380955 + ... + 385274.

It is an arithmetic number, because the mean of its divisors is an integer number (71259390).

Almost surely, 2^1655054640 is an apocalyptic number.

1655054640 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1655054640 is an abundant number, since it is smaller than the sum of its proper divisors (4045696560).

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

1655054640 is a wasteful number, since it uses less digits than its factorization.

1655054640 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 766251 (or 766239 counting only the distinct ones).

The product of its (nonzero) digits is 72000, while the sum is 36.

The square root of 1655054640 is about 40682.3627632418. The cubic root of 1655054640 is about 1182.8711658553.

The spelling of 1655054640 in words is "one billion, six hundred fifty-five million, fifty-four thousand, six hundred forty".