2155380045 has 128 divisors (see below), whose sum is σ = 4579061760. Its totient is φ = 840222720.

The previous prime is 2155380043. The next prime is 2155380053. The reversal of 2155380045 is 5400835512.

It is not a de Polignac number, because 2155380045 - 2¹ = 2155380043 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 2155379988 and 2155380015.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2155380041) by changing a digit.

It is a polite number, since it can be written in 127 ways as a sum of consecutive naturals, for example, 1062322 + ... + 1064348.

It is an arithmetic number, because the mean of its divisors is an integer number (35773920).

Almost surely, 2^2155380045 is an apocalyptic number.

It is an amenable number.

2155380045 is an abundant number, since it is smaller than the sum of its proper divisors (2423681715).

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

2155380045 is a wasteful number, since it uses less digits than its factorization.

2155380045 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2115.

The product of its (nonzero) digits is 24000, while the sum is 33.

The square root of 2155380045 is about 46426.0707469413. The cubic root of 2155380045 is about 1291.7385458624.

The spelling of 2155380045 in words is "two billion, one hundred fifty-five million, three hundred eighty thousand, forty-five".