43851891490 has 64 divisors (see below), whose sum is σ = 88449242112. Its totient is φ = 15515640000.

The previous prime is 43851891451. The next prime is 43851891497. The reversal of 43851891490 is 9419815834.

It is not an unprimeable number, because it can be changed into a prime (43851891497) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 1226365 + ... + 1261615.

It is an arithmetic number, because the mean of its divisors is an integer number (1382019408).

Almost surely, 2^43851891490 is an apocalyptic number.

43851891490 is an abundant number, since it is smaller than the sum of its proper divisors (44597350622).

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

43851891490 is a wasteful number, since it uses less digits than its factorization.

43851891490 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 35575.

The product of its (nonzero) digits is 1244160, while the sum is 52.

The spelling of 43851891490 in words is "forty-three billion, eight hundred fifty-one million, eight hundred ninety-one thousand, four hundred ninety".