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161728432616 = 2329697105313
BaseRepresentation
bin1001011010011111000…
…1000000100111101000
3120110110010120121210202
42112213301000213220
510122204434320431
6202144053331332
714453531665232
oct2264761004750
9513403517722
10161728432616
1162652536173
1227416636b48
131233538c90a
147b832bb252
1543185aa8cb
hex25a7c409e8

161728432616 has 16 divisors (see below), whose sum is σ = 313697391300. Its totient is φ = 78075794944.

The previous prime is 161728432589. The next prime is 161728432661. The reversal of 161728432616 is 616234827161.

It can be written as a sum of positive squares in 2 ways, for example, as 161727839716 + 592900 = 402154^2 + 770^2 .

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 348552425 + ... + 348552888.

Almost surely, 2161728432616 is an apocalyptic number.

It is an amenable number.

161728432616 is a deficient number, since it is larger than the sum of its proper divisors (151968958684).

161728432616 is a wasteful number, since it uses less digits than its factorization.

161728432616 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 697105348 (or 697105344 counting only the distinct ones).

The product of its digits is 580608, while the sum is 47.

The spelling of 161728432616 in words is "one hundred sixty-one billion, seven hundred twenty-eight million, four hundred thirty-two thousand, six hundred sixteen".

Divisors: 1 2 4 8 29 58 116 232 697105313 1394210626 2788421252 5576842504 20216054077 40432108154 80864216308 161728432616