611138778117077 has 6 divisors (see below), whose sum is σ = 710916537809718. Its totient is φ = 523833238386024.

The previous prime is 611138778117071. The next prime is 611138778117083. The reversal of 611138778117077 is 770711877831116.

It is an interprime number because it is at equal distance from previous prime (611138778117071) and next prime (611138778117083).

It can be written as a sum of positive squares in only one way, i.e., 391340540664241 + 219798237452836 = 19782329^2 + 14825594^2 .

It is not a de Polignac number, because 611138778117077 - 2¹² = 611138778112981 is a prime.

It is a super-2 number, since 2×611138778117077² (a number of 30 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (611138778117071) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (29) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 6236109980738 + ... + 6236109980835.

It is an arithmetic number, because the mean of its divisors is an integer number (118486089634953).

Almost surely, 2^{611138778117077} is an apocalyptic number.

It is an amenable number.

611138778117077 is a deficient number, since it is larger than the sum of its proper divisors (99777759692641).

611138778117077 is a wasteful number, since it uses less digits than its factorization.

611138778117077 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12472219961587 (or 12472219961580 counting only the distinct ones).

The product of its (nonzero) digits is 19361664, while the sum is 65.

The spelling of 611138778117077 in words is "six hundred eleven trillion, one hundred thirty-eight billion, seven hundred seventy-eight million, one hundred seventeen thousand, seventy-seven".