1655111040 has 128 divisors (see below), whose sum is σ = 5755345920. Its totient is φ = 401233920.

The previous prime is 1655111039. The next prime is 1655111057. The reversal of 1655111040 is 401115561.

It is a tau number, because it is divible by the number of its divisors (128).

It is a Harshad number since it is a multiple of its sum of digits (24).

It is a self number, because there is not a number n which added to its sum of digits gives 1655111040.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 18064 + ... + 60303.

It is an arithmetic number, because the mean of its divisors is an integer number (44963640).

Almost surely, 2^1655111040 is an apocalyptic number.

1655111040 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1655111040 is an abundant number, since it is smaller than the sum of its proper divisors (4100234880).

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

1655111040 is a wasteful number, since it uses less digits than its factorization.

1655111040 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 78400 (or 78388 counting only the distinct ones).

The product of its (nonzero) digits is 600, while the sum is 24.

The square root of 1655111040 is about 40683.0559324149. The cubic root of 1655111040 is about 1182.8846021037.

It can be divided in two parts, 165 and 5111040, that multiplied together give a square (843321600 = 29040²).

The spelling of 1655111040 in words is "one billion, six hundred fifty-five million, one hundred eleven thousand, forty".