49477640161 has 2 divisors, whose sum is σ = 49477640162. Its totient is φ = 49477640160.

The previous prime is 49477640159. The next prime is 49477640231. The reversal of 49477640161 is 16104677494.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 25625926561 + 23851713600 = 160081^2 + 154440^2 .

It is a cyclic number.

It is not a de Polignac number, because 49477640161 - 2¹ = 49477640159 is a prime.

Together with 49477640159, it forms a pair of twin primes.

It is not a weakly prime, because it can be changed into another prime (49477640101) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 24738820080 + 24738820081.

It is an arithmetic number, because the mean of its divisors is an integer number (24738820081).

Almost surely, 2^49477640161 is an apocalyptic number.

It is an amenable number.

49477640161 is a deficient number, since it is larger than the sum of its proper divisors (1).

49477640161 is an equidigital number, since it uses as much as digits as its factorization.

49477640161 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1016064, while the sum is 49.

The spelling of 49477640161 in words is "forty-nine billion, four hundred seventy-seven million, six hundred forty thousand, one hundred sixty-one".