2155296099840 has 1920 divisors, whose sum is σ = 8571380539392. Its totient is φ = 458835886080.

The previous prime is 2155296099833. The next prime is 2155296099841. The reversal of 2155296099840 is 489906925512.

It is a tau number, because it is divible by the number of its divisors (1920).

It is a Harshad number since it is a multiple of its sum of digits (60).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2155296099841) by changing a digit.

It is a polite number, since it can be written in 191 ways as a sum of consecutive naturals, for example, 15732088252 + ... + 15732088388.

Almost surely, 2^{2155296099840} is an apocalyptic number.

2155296099840 is a gapful number since it is divisible by the number (20) 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 2155296099840, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (4285690269696).

2155296099840 is an abundant number, since it is smaller than the sum of its proper divisors (6416084439552).

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

2155296099840 is a wasteful number, since it uses less digits than its factorization.

2155296099840 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 260 (or 231 counting only the distinct ones).

The product of its (nonzero) digits is 13996800, while the sum is 60.

The spelling of 2155296099840 in words is "two trillion, one hundred fifty-five billion, two hundred ninety-six million, ninety-nine thousand, eight hundred forty".