2155601624340 has 96 divisors (see below), whose sum is σ = 6096242630016. Its totient is φ = 569061158400.

The previous prime is 2155601624317. The next prime is 2155601624353. The reversal of 2155601624340 is 434261065512.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 58236279 + ... + 58273281.

It is an arithmetic number, because the mean of its divisors is an integer number (63502527396).

Almost surely, 2^{2155601624340} is an apocalyptic number.

2155601624340 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 2155601624340, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (3048121315008).

2155601624340 is an abundant number, since it is smaller than the sum of its proper divisors (3940641005676).

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

2155601624340 is a wasteful number, since it uses less digits than its factorization.

2155601624340 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 46729 (or 46727 counting only the distinct ones).

The product of its (nonzero) digits is 172800, while the sum is 39.

Adding to 2155601624340 its reverse (434261065512), we get a palindrome (2589862689852).

The spelling of 2155601624340 in words is "two trillion, one hundred fifty-five billion, six hundred one million, six hundred twenty-four thousand, three hundred forty".