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32161393969 is a prime number
BaseRepresentation
bin11101111100111101…
…111110110100110001
310002000101100002111121
4131330331332310301
51011331304101334
622435202142241
72215663223665
oct357475766461
9102011302447
1032161393969
11127042a5341
126296951981
1330570ca543
1417b15168a5
15c8376bdb4
hex77cf7ed31

32161393969 has 2 divisors, whose sum is σ = 32161393970. Its totient is φ = 32161393968.

The previous prime is 32161393967. The next prime is 32161393997. The reversal of 32161393969 is 96939316123.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 31298209569 + 863184400 = 176913^2 + 29380^2 .

It is a cyclic number.

It is not a de Polignac number, because 32161393969 - 21 = 32161393967 is a prime.

It is a super-2 number, since 2×321613939692 (a number of 22 digits) contains 22 as substring.

Together with 32161393967, it forms a pair of twin primes.

It is not a weakly prime, because it can be changed into another prime (32161393961) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 16080696984 + 16080696985.

It is an arithmetic number, because the mean of its divisors is an integer number (16080696985).

Almost surely, 232161393969 is an apocalyptic number.

It is an amenable number.

32161393969 is a deficient number, since it is larger than the sum of its proper divisors (1).

32161393969 is an equidigital number, since it uses as much as digits as its factorization.

32161393969 is an evil number, because the sum of its binary digits is even.

The product of its digits is 1417176, while the sum is 52.

The spelling of 32161393969 in words is "thirty-two billion, one hundred sixty-one million, three hundred ninety-three thousand, nine hundred sixty-nine".