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161145406789 is a prime number
BaseRepresentation
bin1001011000010100000…
…0111100010101000101
3120101221111111211201121
42112011000330111011
510120011211004124
6202010145153541
714433222233413
oct2260500742505
9511844454647
10161145406789
1162383421244
122729332b8b1
1312271658113
147b29ab22b3
1542d22e22e4
hex258503c545

161145406789 has 2 divisors, whose sum is σ = 161145406790. Its totient is φ = 161145406788.

The previous prime is 161145406783. The next prime is 161145406867. The reversal of 161145406789 is 987604541161.

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., 104356133764 + 56789273025 = 323042^2 + 238305^2 .

It is a cyclic number.

It is not a de Polignac number, because 161145406789 - 211 = 161145404741 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (161145406783) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 80572703394 + 80572703395.

It is an arithmetic number, because the mean of its divisors is an integer number (80572703395).

Almost surely, 2161145406789 is an apocalyptic number.

It is an amenable number.

161145406789 is a deficient number, since it is larger than the sum of its proper divisors (1).

161145406789 is an equidigital number, since it uses as much as digits as its factorization.

161145406789 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1451520, while the sum is 52.

The spelling of 161145406789 in words is "one hundred sixty-one billion, one hundred forty-five million, four hundred six thousand, seven hundred eighty-nine".