61311744001 has 4 divisors (see below), whose sum is σ = 63425942100. Its totient is φ = 59197545904.

The previous prime is 61311743989. The next prime is 61311744017. The reversal of 61311744001 is 10044711316.

It is a happy number.

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 15568800625 + 45742943376 = 124775^2 + 213876^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-61311744001 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (61311744041) 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 3 ways as a sum of consecutive naturals, for example, 1057099006 + ... + 1057099063.

It is an arithmetic number, because the mean of its divisors is an integer number (15856485525).

Almost surely, 2^61311744001 is an apocalyptic number.

It is an amenable number.

61311744001 is a deficient number, since it is larger than the sum of its proper divisors (2114198099).

61311744001 is a wasteful number, since it uses less digits than its factorization.

61311744001 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2114198098.

The product of its (nonzero) digits is 2016, while the sum is 28.

The spelling of 61311744001 in words is "sixty-one billion, three hundred eleven million, seven hundred forty-four thousand, one".