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61983087467 = 78854726781
BaseRepresentation
bin111001101110011110…
…101101101101101011
312220222201010002100012
4321232132231231223
52003420132244332
644250304402135
74322666356550
oct715636555553
9186881102305
1061983087467
1124317923024
121001a01634b
135aca562522
142ddddc8a27
15192b8c43b2
hexe6e7adb6b

61983087467 has 4 divisors (see below), whose sum is σ = 70837814256. Its totient is φ = 53128360680.

The previous prime is 61983087449. The next prime is 61983087589. The reversal of 61983087467 is 76478038916.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 61983087467 - 28 = 61983087211 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (61983087367) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 4427363384 + ... + 4427363397.

It is an arithmetic number, because the mean of its divisors is an integer number (17709453564).

Almost surely, 261983087467 is an apocalyptic number.

61983087467 is a deficient number, since it is larger than the sum of its proper divisors (8854726789).

61983087467 is an equidigital number, since it uses as much as digits as its factorization.

61983087467 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8854726788.

The product of its (nonzero) digits is 12192768, while the sum is 59.

The spelling of 61983087467 in words is "sixty-one billion, nine hundred eighty-three million, eighty-seven thousand, four hundred sixty-seven".

Divisors: 1 7 8854726781 61983087467