61011318568 has 8 divisors (see below), whose sum is σ = 114396222330. Its totient is φ = 30505659280.

The previous prime is 61011318527. The next prime is 61011318569. The reversal of 61011318568 is 86581311016.

61011318568 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in only one way, i.e., 31755952804 + 29255365764 = 178202^2 + 171042^2 .

It is a tau number, because it is divible by the number of its divisors (8).

It is a self number, because there is not a number n which added to its sum of digits gives 61011318568.

It is not an unprimeable number, because it can be changed into a prime (61011318569) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3813207403 + ... + 3813207418.

Almost surely, 2^61011318568 is an apocalyptic number.

It is an amenable number.

61011318568 is a deficient number, since it is larger than the sum of its proper divisors (53384903762).

61011318568 is a wasteful number, since it uses less digits than its factorization.

61011318568 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7626414827 (or 7626414823 counting only the distinct ones).

The product of its (nonzero) digits is 34560, while the sum is 40.

The spelling of 61011318568 in words is "sixty-one billion, eleven million, three hundred eighteen thousand, five hundred sixty-eight".