8403721854 has 32 divisors (see below), whose sum is σ = 18567498240. Its totient is φ = 2514345600.

The previous prime is 8403721801. The next prime is 8403721861. The reversal of 8403721854 is 4581273048.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 800667 + ... + 811094.

It is an arithmetic number, because the mean of its divisors is an integer number (580234320).

Almost surely, 2^8403721854 is an apocalyptic number.

8403721854 is an abundant number, since it is smaller than the sum of its proper divisors (10163776386).

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

8403721854 is a wasteful number, since it uses less digits than its factorization.

8403721854 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1611856.

The product of its (nonzero) digits is 215040, while the sum is 42.

The square root of 8403721854 is about 91671.8160287010. The cubic root of 8403721854 is about 2033.0928977789.

The spelling of 8403721854 in words is "eight billion, four hundred three million, seven hundred twenty-one thousand, eight hundred fifty-four".