2051144634 has 128 divisors (see below), whose sum is σ = 5268307968. Its totient is φ = 516922560.

The previous prime is 2051144629. The next prime is 2051144647. The reversal of 2051144634 is 4364411502.

It is an unprimeable number.

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 63 ways as a sum of consecutive naturals, for example, 4429887 + ... + 4430349.

It is an arithmetic number, because the mean of its divisors is an integer number (41158656).

Almost surely, 2^2051144634 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 2051144634, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2634153984).

2051144634 is an abundant number, since it is smaller than the sum of its proper divisors (3217163334).

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

2051144634 is a wasteful number, since it uses less digits than its factorization.

2051144634 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 752.

The product of its (nonzero) digits is 11520, while the sum is 30.

The square root of 2051144634 is about 45289.5642946584. The cubic root of 2051144634 is about 1270.5704825363.

The spelling of 2051144634 in words is "two billion, fifty-one million, one hundred forty-four thousand, six hundred thirty-four".