611661330554274 has 384 divisors, whose sum is σ = 1857823925126400. Its totient is φ = 146633824834560.

The previous prime is 611661330554273. The next prime is 611661330554303. The reversal of 611661330554274 is 472455033166116.

611661330554274 is a `hidden beast` number, since 6 + 1 + 1 + 6 + 6 + 13 + 3 + 0 + 554 + 2 + 74 = 666.

It is a Harshad number since it is a multiple of its sum of digits (54).

It is a self number, because there is not a number n which added to its sum of digits gives 611661330554274.

It is not an unprimeable number, because it can be changed into a prime (611661330554273) by changing a digit.

It is a polite number, since it can be written in 191 ways as a sum of consecutive naturals, for example, 3174116694 + ... + 3174309390.

It is an arithmetic number, because the mean of its divisors is an integer number (4838083138350).

Almost surely, 2^{611661330554274} is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 611661330554274, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (928911962563200).

611661330554274 is an abundant number, since it is smaller than the sum of its proper divisors (1246162594572126).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

611661330554274 is a wasteful number, since it uses less digits than its factorization.

611661330554274 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 201135 (or 201122 counting only the distinct ones).

The product of its (nonzero) digits is 10886400, while the sum is 54.

The spelling of 611661330554274 in words is "six hundred eleven trillion, six hundred sixty-one billion, three hundred thirty million, five hundred fifty-four thousand, two hundred seventy-four".