1655661201500 has 96 divisors (see below), whose sum is σ = 3625510988736. Its totient is φ = 660518380800.

The previous prime is 1655661201487. The next prime is 1655661201529. The reversal of 1655661201500 is 51021665561.

It is a happy number.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 400593434 + ... + 400597566.

It is an arithmetic number, because the mean of its divisors is an integer number (37765739466).

Almost surely, 2^{1655661201500} is an apocalyptic number.

1655661201500 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 1655661201500, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1812755494368).

1655661201500 is an abundant number, since it is smaller than the sum of its proper divisors (1969849787236).

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

1655661201500 is a wasteful number, since it uses less digits than its factorization.

1655661201500 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6072 (or 6060 counting only the distinct ones).

The product of its (nonzero) digits is 54000, while the sum is 38.

The spelling of 1655661201500 in words is "one trillion, six hundred fifty-five billion, six hundred sixty-one million, two hundred one thousand, five hundred".