2155464033660 has 576 divisors, whose sum is σ = 8289108172800. Its totient is φ = 442031800320.

The previous prime is 2155464033649. The next prime is 2155464033731. The reversal of 2155464033660 is 663304645512.

2155464033660 is a `hidden beast` number, since 2 + 1 + 5 + 546 + 40 + 3 + 3 + 6 + 60 = 666.

It is a super-2 number, since 2×2155464033660² (a number of 25 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 191 ways as a sum of consecutive naturals, for example, 44465116 + ... + 44513564.

It is an arithmetic number, because the mean of its divisors is an integer number (14390812800).

Almost surely, 2^{2155464033660} is an apocalyptic number.

2155464033660 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 2155464033660, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (4144554086400).

2155464033660 is an abundant number, since it is smaller than the sum of its proper divisors (6133644139140).

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

2155464033660 is a wasteful number, since it uses less digits than its factorization.

2155464033660 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 48586 (or 48581 counting only the distinct ones).

The product of its (nonzero) digits is 1555200, while the sum is 45.

The spelling of 2155464033660 in words is "two trillion, one hundred fifty-five billion, four hundred sixty-four million, thirty-three thousand, six hundred sixty".