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80776920692 = 221310115380221
BaseRepresentation
bin100101100111010101…
…1011111111001110100
321201111111000201211102
41023032223133321310
52310412342430232
6101035225425232
75556504332336
oct1131653377164
9251444021742
1080776920692
11312915140a6
12137a403b218
137804096ac0
143ca4017456
15217b7d7662
hex12ceadfe74

80776920692 has 24 divisors (see below), whose sum is σ = 153740699112. Its totient is φ = 36912528000.

The previous prime is 80776920683. The next prime is 80776920727. The reversal of 80776920692 is 29602967708.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 17380730896 + 63396189796 = 131836^2 + 251786^2 .

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 7684859 + ... + 7695362.

It is an arithmetic number, because the mean of its divisors is an integer number (6405862463).

Almost surely, 280776920692 is an apocalyptic number.

It is an amenable number.

80776920692 is a deficient number, since it is larger than the sum of its proper divisors (72963778420).

80776920692 is a wasteful number, since it uses less digits than its factorization.

80776920692 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 15380339 (or 15380337 counting only the distinct ones).

The product of its (nonzero) digits is 4572288, while the sum is 56.

The spelling of 80776920692 in words is "eighty billion, seven hundred seventy-six million, nine hundred twenty thousand, six hundred ninety-two".

Divisors: 1 2 4 13 26 52 101 202 404 1313 2626 5252 15380221 30760442 61520884 199942873 399885746 799771492 1553402321 3106804642 6213609284 20194230173 40388460346 80776920692