611601011 has 4 divisors (see below), whose sum is σ = 698972592. Its totient is φ = 524229432.

The previous prime is 611601007. The next prime is 611601019. The reversal of 611601011 is 110106116.

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 611601011 - 2² = 611601007 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (611601019) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 43685780 + ... + 43685793.

It is an arithmetic number, because the mean of its divisors is an integer number (174743148).

Almost surely, 2^611601011 is an apocalyptic number.

611601011 is a deficient number, since it is larger than the sum of its proper divisors (87371581).

611601011 is an equidigital number, since it uses as much as digits as its factorization.

611601011 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 87371580.

The product of its (nonzero) digits is 36, while the sum is 17.

The square root of 611601011 is about 24730.5683517383. The cubic root of 611601011 is about 848.8339309375.

Adding to 611601011 its reverse (110106116), we get a palindrome (721707127).

It can be divided in two parts, 61160 and 1011, that multiplied together give a triangular number (61832760 = T₁₁₁₂₀).

The spelling of 611601011 in words is "six hundred eleven million, six hundred one thousand, eleven".