611404011988 has 24 divisors (see below), whose sum is σ = 1333972390464. Its totient is φ = 238209355200.

The previous prime is 611404011983. The next prime is 611404011997. The reversal of 611404011988 is 889110404116.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (611404011983) by changing a digit.

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 7 ways as a sum of consecutive naturals, for example, 992538673 + ... + 992539288.

It is an arithmetic number, because the mean of its divisors is an integer number (55582182936).

Almost surely, 2^611404011988 is an apocalyptic number.

It is an amenable number.

611404011988 is an abundant number, since it is smaller than the sum of its proper divisors (722568378476).

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

611404011988 is a wasteful number, since it uses less digits than its factorization.

611404011988 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1985077983 (or 1985077981 counting only the distinct ones).

The product of its (nonzero) digits is 55296, while the sum is 43.

The spelling of 611404011988 in words is "six hundred eleven billion, four hundred four million, eleven thousand, nine hundred eighty-eight".