1655193540 has 576 divisors, whose sum is σ = 6589513728. Its totient is φ = 304819200.

The previous prime is 1655193523. The next prime is 1655193563. The reversal of 1655193540 is 453915561.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (39).

It is an unprimeable number.

It is a polite number, since it can be written in 191 ways as a sum of consecutive naturals, for example, 13032957 + ... + 13033083.

It is an arithmetic number, because the mean of its divisors is an integer number (11440128).

Almost surely, 2^1655193540 is an apocalyptic number.

1655193540 is a gapful number since it is divisible by the number (10) 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 1655193540, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (3294756864).

1655193540 is an abundant number, since it is smaller than the sum of its proper divisors (4934320188).

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

1655193540 is a wasteful number, since it uses less digits than its factorization.

1655193540 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 208 (or 199 counting only the distinct ones).

The product of its (nonzero) digits is 81000, while the sum is 39.

The square root of 1655193540 is about 40684.0698554115. The cubic root of 1655193540 is about 1182.9042556408.

The spelling of 1655193540 in words is "one billion, six hundred fifty-five million, one hundred ninety-three thousand, five hundred forty".