611091686305 has 4 divisors (see below), whose sum is σ = 733310023572. Its totient is φ = 488873349040.

The previous prime is 611091686299. The next prime is 611091686341. The reversal of 611091686305 is 503686190116.

611091686305 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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

It can be written as a sum of positive squares in 2 ways, for example, as 138571551504 + 472520134801 = 372252^2 + 687401^2 .

It is not a de Polignac number, because 611091686305 - 2⁹ = 611091685793 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 61109168626 + ... + 61109168635.

It is an arithmetic number, because the mean of its divisors is an integer number (183327505893).

Almost surely, 2^611091686305 is an apocalyptic number.

It is an amenable number.

611091686305 is a deficient number, since it is larger than the sum of its proper divisors (122218337267).

611091686305 is a wasteful number, since it uses less digits than its factorization.

611091686305 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 122218337266.

The product of its (nonzero) digits is 233280, while the sum is 46.

The spelling of 611091686305 in words is "six hundred eleven billion, ninety-one million, six hundred eighty-six thousand, three hundred five".