61172944403 has 2 divisors, whose sum is σ = 61172944404. Its totient is φ = 61172944402.

The previous prime is 61172944363. The next prime is 61172944463. The reversal of 61172944403 is 30444927116.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-61172944403 is a prime.

It is a Sophie Germain prime.

It is not a weakly prime, because it can be changed into another prime (61172944463) 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 as a sum of consecutive naturals, namely, 30586472201 + 30586472202.

It is an arithmetic number, because the mean of its divisors is an integer number (30586472202).

Almost surely, 2^61172944403 is an apocalyptic number.

61172944403 is a deficient number, since it is larger than the sum of its proper divisors (1).

61172944403 is an equidigital number, since it uses as much as digits as its factorization.

61172944403 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 145152, while the sum is 41.

The spelling of 61172944403 in words is "sixty-one billion, one hundred seventy-two million, nine hundred forty-four thousand, four hundred three".