1655000111380 has 384 divisors, whose sum is σ = 4721700372480. Its totient is φ = 471703357440.

The previous prime is 1655000111371. The next prime is 1655000111431. The reversal of 1655000111380 is 831110005561.

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 127 ways as a sum of consecutive naturals, for example, 137486722 + ... + 137498758.

It is an arithmetic number, because the mean of its divisors is an integer number (12296094720).

Almost surely, 2^{1655000111380} is an apocalyptic number.

1655000111380 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 1655000111380, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2360850186240).

1655000111380 is an abundant number, since it is smaller than the sum of its proper divisors (3066700261100).

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

1655000111380 is a wasteful number, since it uses less digits than its factorization.

1655000111380 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12247 (or 12245 counting only the distinct ones).

The product of its (nonzero) digits is 3600, while the sum is 31.

The spelling of 1655000111380 in words is "one trillion, six hundred fifty-five billion, one hundred eleven thousand, three hundred eighty".