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161145405803 is a prime number
BaseRepresentation
bin1001011000010100000…
…0111100000101101011
3120101221111111210101002
42112011000330011223
510120011210441203
6202010145145215
714433222230504
oct2260500740553
9511844453332
10161145405803
1162383420528
122729332b20b
1312271657835
147b29ab1bab
1542d22e1d88
hex258503c16b

161145405803 has 2 divisors, whose sum is σ = 161145405804. Its totient is φ = 161145405802.

The previous prime is 161145405727. The next prime is 161145405851. The reversal of 161145405803 is 308504541161.

It is a strong prime.

It is an emirp because it is prime and its reverse (308504541161) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 161145405803 - 218 = 161145143659 is a prime.

It is a super-2 number, since 2×1611454058032 (a number of 23 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (161145405853) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 80572702901 + 80572702902.

It is an arithmetic number, because the mean of its divisors is an integer number (80572702902).

Almost surely, 2161145405803 is an apocalyptic number.

161145405803 is a deficient number, since it is larger than the sum of its proper divisors (1).

161145405803 is an equidigital number, since it uses as much as digits as its factorization.

161145405803 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 57600, while the sum is 38.

Adding to 161145405803 its reverse (308504541161), we get a palindrome (469649946964).

The spelling of 161145405803 in words is "one hundred sixty-one billion, one hundred forty-five million, four hundred five thousand, eight hundred three".