611802780948 has 18 divisors (see below), whose sum is σ = 1546501474154. Its totient is φ = 203934260304.

The previous prime is 611802780947. The next prime is 611802780961. The reversal of 611802780948 is 849087208116.

It can be written as a sum of positive squares in only one way, i.e., 605660610564 + 6142170384 = 778242^2 + 78372^2 .

It is a tau number, because it is divible by the number of its divisors (18).

It is a junction number, because it is equal to n+sod(n) for n = 611802780894 and 611802780903.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (611802780947) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 8497260811 + ... + 8497260882.

Almost surely, 2^611802780948 is an apocalyptic number.

It is an amenable number.

611802780948 is an abundant number, since it is smaller than the sum of its proper divisors (934698693206).

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

611802780948 is a wasteful number, since it uses less digits than its factorization.

611802780948 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 16994521703 (or 16994521698 counting only the distinct ones).

The product of its (nonzero) digits is 1548288, while the sum is 54.

The spelling of 611802780948 in words is "six hundred eleven billion, eight hundred two million, seven hundred eighty thousand, nine hundred forty-eight".