611881471 has 4 divisors (see below), whose sum is σ = 612183600. Its totient is φ = 611579344.

The previous prime is 611881433. The next prime is 611881483. The reversal of 611881471 is 174188116.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 611881471 - 2²¹ = 609784319 is a prime.

It is a super-3 number, since 3×611881471³ (a number of 27 digits) contains 333 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 611881471.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (611881421) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 148006 + ... + 152083.

It is an arithmetic number, because the mean of its divisors is an integer number (153045900).

Almost surely, 2^611881471 is an apocalyptic number.

611881471 is a deficient number, since it is larger than the sum of its proper divisors (302129).

611881471 is a wasteful number, since it uses less digits than its factorization.

611881471 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 302128.

The product of its digits is 10752, while the sum is 37.

The square root of 611881471 is about 24736.2380122766. The cubic root of 611881471 is about 848.9636601672.

The spelling of 611881471 in words is "six hundred eleven million, eight hundred eighty-one thousand, four hundred seventy-one".