2055156402 has 64 divisors (see below), whose sum is σ = 4507937280. Its totient is φ = 620815104.

The previous prime is 2055156391. The next prime is 2055156403. The reversal of 2055156402 is 2046515502.

It is a self number, because there is not a number n which added to its sum of digits gives 2055156402.

It is not an unprimeable number, because it can be changed into a prime (2055156403) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 1213068 + ... + 1214760.

It is an arithmetic number, because the mean of its divisors is an integer number (70436520).

Almost surely, 2^2055156402 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 2055156402, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2253968640).

2055156402 is an abundant number, since it is smaller than the sum of its proper divisors (2452780878).

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

2055156402 is a wasteful number, since it uses less digits than its factorization.

2055156402 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1987.

The product of its (nonzero) digits is 12000, while the sum is 30.

The square root of 2055156402 is about 45333.8328624439. The cubic root of 2055156402 is about 1271.3982990887.

The spelling of 2055156402 in words is "two billion, fifty-five million, one hundred fifty-six thousand, four hundred two".