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BaseRepresentation
bin1001011000010100000…
…0111100010101010011
3120101221111111211202010
42112011000330111103
510120011211004203
6202010145154003
714433222233433
oct2260500742523
9511844454663
10161145406803
1162383421257
122729332b903
1312271658124
147b29ab22c3
1542d22e2303
hex258503c553

161145406803 has 4 divisors (see below), whose sum is σ = 214860542408. Its totient is φ = 107430271200.

The previous prime is 161145406789. The next prime is 161145406867. The reversal of 161145406803 is 308604541161.

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

It is not a de Polignac number, because 161145406803 - 221 = 161143309651 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (161145405803) 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, 26857567798 + ... + 26857567803.

It is an arithmetic number, because the mean of its divisors is an integer number (53715135602).

Almost surely, 2161145406803 is an apocalyptic number.

161145406803 is a deficient number, since it is larger than the sum of its proper divisors (53715135605).

161145406803 is an equidigital number, since it uses as much as digits as its factorization.

161145406803 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 53715135604.

The product of its (nonzero) digits is 69120, while the sum is 39.

Adding to 161145406803 its reverse (308604541161), we get a palindrome (469749947964).

The spelling of 161145406803 in words is "one hundred sixty-one billion, one hundred forty-five million, four hundred six thousand, eight hundred three".

Divisors: 1 3 53715135601 161145406803