611716421 has 16 divisors (see below), whose sum is σ = 638592768. Its totient is φ = 585561600.

The previous prime is 611716411. The next prime is 611716447. The reversal of 611716421 is 124617116.

It is a cyclic number.

It is not a de Polignac number, because 611716421 - 2²² = 607522117 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (611716411) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 448781 + ... + 450141.

It is an arithmetic number, because the mean of its divisors is an integer number (39912048).

Almost surely, 2^611716421 is an apocalyptic number.

It is an amenable number.

611716421 is a deficient number, since it is larger than the sum of its proper divisors (26876347).

611716421 is a wasteful number, since it uses less digits than its factorization.

611716421 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1612.

The product of its digits is 2016, while the sum is 29.

The square root of 611716421 is about 24732.9015887744. The cubic root of 611716421 is about 848.8873196451.

The spelling of 611716421 in words is "six hundred eleven million, seven hundred sixteen thousand, four hundred twenty-one".