611261005 has 8 divisors (see below), whose sum is σ = 751404024. Its totient is φ = 477081600.

The previous prime is 611260997. The next prime is 611261011. The reversal of 611261005 is 500162116.

611261005 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 4 ways, for example, as 61921161 + 549339844 = 7869^2 + 23438^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 611261005 - 2³ = 611260997 is a prime.

It is a super-2 number, since 2×611261005² = 747280032467220050, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1490676 + ... + 1491085.

It is an arithmetic number, because the mean of its divisors is an integer number (93925503).

Almost surely, 2^611261005 is an apocalyptic number.

It is an amenable number.

611261005 is a deficient number, since it is larger than the sum of its proper divisors (140143019).

611261005 is a wasteful number, since it uses less digits than its factorization.

611261005 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2981807.

The product of its (nonzero) digits is 360, while the sum is 22.

The square root of 611261005 is about 24723.6931909454. The cubic root of 611261005 is about 848.6766049888.

The spelling of 611261005 in words is "six hundred eleven million, two hundred sixty-one thousand, five".