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80418006451 = 6721393592
BaseRepresentation
bin100101011100101001…
…0010110010110110011
321200120110200000001101
41022321102112112303
52304144002201301
6100535444545231
75544555530206
oct1127122262663
9250513600041
1080418006451
1131117960562
12137039b2217
13777790c303
143c6c4a993d
15215a03c701
hex12b94965b3

80418006451 has 18 divisors (see below), whose sum is σ = 82453173180. Its totient is φ = 78428751192.

The previous prime is 80418006443. The next prime is 80418006463. The reversal of 80418006451 is 15460081408.

It is not a de Polignac number, because 80418006451 - 23 = 80418006443 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 80418006451.

It is not an unprimeable number, because it can be changed into a prime (80418006401) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 17 ways as a sum of consecutive naturals, for example, 224005410 + ... + 224005768.

Almost surely, 280418006451 is an apocalyptic number.

80418006451 is a deficient number, since it is larger than the sum of its proper divisors (2035166729).

80418006451 is an frugal number, since it uses more digits than its factorization.

80418006451 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 991 (or 565 counting only the distinct ones).

The product of its (nonzero) digits is 30720, while the sum is 37.

Adding to 80418006451 its reverse (15460081408), we get a palindrome (95878087859).

The spelling of 80418006451 in words is "eighty billion, four hundred eighteen million, six thousand, four hundred fifty-one".

Divisors: 1 67 139 359 4489 9313 24053 49901 128881 623971 1611551 3343367 8635027 17914459 224005589 578546809 1200268753 80418006451