2155740972280 has 192 divisors, whose sum is σ = 5926650094080. Its totient is φ = 702291744000.

The previous prime is 2155740972263. The next prime is 2155740972361. The reversal of 2155740972280 is 822790475512.

It is a hoax number, since the sum of its digits (52) coincides with the sum of the digits of its distinct prime factors.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 6648735 + ... + 6965425.

It is an arithmetic number, because the mean of its divisors is an integer number (30867969240).

Almost surely, 2^{2155740972280} is an apocalyptic number.

2155740972280 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 2155740972280, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2963325047040).

2155740972280 is an abundant number, since it is smaller than the sum of its proper divisors (3770909121800).

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

2155740972280 is a wasteful number, since it uses less digits than its factorization.

2155740972280 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 316890 (or 316879 counting only the distinct ones).

The product of its (nonzero) digits is 2822400, while the sum is 52.

The spelling of 2155740972280 in words is "two trillion, one hundred fifty-five billion, seven hundred forty million, nine hundred seventy-two thousand, two hundred eighty".