611421998 has 16 divisors (see below), whose sum is σ = 1002492720. Its totient is φ = 277368000.

The previous prime is 611421997. The next prime is 611422037. The reversal of 611421998 is 899124116.

611421998 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (611421991) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 16103 + ... + 38498.

It is an arithmetic number, because the mean of its divisors is an integer number (62655795).

Almost surely, 2^611421998 is an apocalyptic number.

611421998 is a deficient number, since it is larger than the sum of its proper divisors (391070722).

611421998 is a wasteful number, since it uses less digits than its factorization.

611421998 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 55123.

The product of its digits is 31104, while the sum is 41.

The square root of 611421998 is about 24726.9488210737. The cubic root of 611421998 is about 848.7511061692.

The spelling of 611421998 in words is "six hundred eleven million, four hundred twenty-one thousand, nine hundred ninety-eight".