611406520750477 has 4 divisors (see below), whose sum is σ = 611533447581276. Its totient is φ = 611279593919680.

The previous prime is 611406520750471. The next prime is 611406520750507. The reversal of 611406520750477 is 774057025604116.

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 274712425951401 + 336694094799076 = 16574451^2 + 18349226^2 .

It is a cyclic number.

It is not a de Polignac number, because 611406520750477 - 2²⁷ = 611406386532749 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 (611406520750471) 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, 63463408174 + ... + 63463417807.

It is an arithmetic number, because the mean of its divisors is an integer number (152883361895319).

Almost surely, 2^{611406520750477} is an apocalyptic number.

It is an amenable number.

611406520750477 is a deficient number, since it is larger than the sum of its proper divisors (126926830799).

611406520750477 is a wasteful number, since it uses less digits than its factorization.

611406520750477 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 126926830798.

The product of its (nonzero) digits is 9878400, while the sum is 55.

The spelling of 611406520750477 in words is "six hundred eleven trillion, four hundred six billion, five hundred twenty million, seven hundred fifty thousand, four hundred seventy-seven".