4251442636 has 48 divisors (see below), whose sum is σ = 8937524736. Its totient is φ = 1730070144.

The previous prime is 4251442631. The next prime is 4251442661. The reversal of 4251442636 is 6362441524.

It is a junction number, because it is equal to n+sod(n) for n = 4251442595 and 4251442604.

It is not an unprimeable number, because it can be changed into a prime (4251442631) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 64135 + ... + 112321.

It is an arithmetic number, because the mean of its divisors is an integer number (186198432).

Almost surely, 2^4251442636 is an apocalyptic number.

4251442636 is a gapful number since it is divisible by the number (46) 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 4251442636, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (4468762368).

4251442636 is an abundant number, since it is smaller than the sum of its proper divisors (4686082100).

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

4251442636 is a wasteful number, since it uses less digits than its factorization.

4251442636 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 48358 (or 48356 counting only the distinct ones).

The product of its digits is 138240, while the sum is 37.

The square root of 4251442636 is about 65203.0876262773. The cubic root of 4251442636 is about 1619.9891575762.

The spelling of 4251442636 in words is "four billion, two hundred fifty-one million, four hundred forty-two thousand, six hundred thirty-six".