611878887 has 8 divisors (see below), whose sum is σ = 906487280. Its totient is φ = 407919240.

The previous prime is 611878871. The next prime is 611878889. The reversal of 611878887 is 788878116.

It is a happy number.

It is not a de Polignac number, because 611878887 - 2⁴ = 611878871 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 (611878889) 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, 11331064 + ... + 11331117.

It is an arithmetic number, because the mean of its divisors is an integer number (113310910).

Almost surely, 2^611878887 is an apocalyptic number.

611878887 is a deficient number, since it is larger than the sum of its proper divisors (294608393).

611878887 is a wasteful number, since it uses less digits than its factorization.

611878887 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 22662190 (or 22662184 counting only the distinct ones).

The product of its digits is 1204224, while the sum is 54.

The square root of 611878887 is about 24736.1857811587. The cubic root of 611878887 is about 848.9624650963.

The spelling of 611878887 in words is "six hundred eleven million, eight hundred seventy-eight thousand, eight hundred eighty-seven".