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78023032087 = 71121319372943
BaseRepresentation
bin100100010101010001…
…0001111110100010111
321110101120002200212011
41020222202033310113
52234242344011322
655502052205051
75431324554520
oct1105242176427
9243346080764
1078023032087
11300a8a70900
1213155909787
137485693010
143ac2397847
152069b5a677
hex122a88fd17

78023032087 has 48 divisors (see below), whose sum is σ = 111107476480. Its totient is φ = 53166611520.

The previous prime is 78023032081. The next prime is 78023032097.

78023032087 is nontrivially palindromic in base 10.

It is not a de Polignac number, because 78023032087 - 215 = 78022999319 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (78023032081) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 22738 + ... + 395680.

Almost surely, 278023032087 is an apocalyptic number.

78023032087 is a gapful number since it is divisible by the number (77) formed by its first and last digit.

78023032087 is a deficient number, since it is larger than the sum of its proper divisors (33084444393).

78023032087 is a wasteful number, since it uses less digits than its factorization.

78023032087 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 373004 (or 372993 counting only the distinct ones).

The product of its (nonzero) digits is 112896, while the sum is 40.

The spelling of 78023032087 in words is "seventy-eight billion, twenty-three million, thirty-two thousand, eighty-seven".

Divisors: 1 7 11 13 19 77 91 121 133 143 209 247 847 1001 1463 1573 1729 2299 2717 11011 16093 19019 29887 209209 372943 2610601 4102373 4848259 7085917 28716611 33937813 45126103 49601419 53330849 77945087 92116921 315882721 373315943 545615609 586639339 644818447 857395957 1013286131 4106475373 6001771699 7093002917 11146147441 78023032087